Import and use authenticated SAP WSDLs with Eclipse/Maven - eclipse

Question

I have an ASP.NET (C#) project that is based on consuming SOAP services from the german SAP ERP and we recently decided to port it to a Java dynamic web project. Mostly of all these web services needs authentication.
On Visual Studio (ASP.NET), though, it was pretty easy and straightforward to import a web service, as easy as clicking on Add service reference, putting the WSDL URL, giving a namespace name and clicking on Ok. Done. All the generated classes will be "hidden" just so someone wouldnt change then. Nice! Also, we have a bindings file, which is plain XML, containing stuff like maxBufferSize, maxBufferPoolSize, maxReceivedMessageSize etc...
On Eclipse (Java), I tried adding a New Web Service Client (New > Web Services > Web Service Client) and this is where I faced my first problem. It is like it does not recognize the WSDL as a valid URL for some reason, however it works in any browser (it even prompts for the authentication) and also in the Visual Studio project. This is what the WSDL look like: http://spceqsap01:8000/sap/bc/srt/wsdl/flv_10002A111AD1/bndg_url/sap/bc/srt/rfc/sap/zws_listar_municipios/300/zws_listar_municipios/zws_listar_municipios?sap-client=300
There are a few WSDLs out there used in examples and they are "successfully" imported, except that the Eclipse complains about some JARs. One curious thing that I noted is that most of them ends with ?wsdl, but placing this in the above WSDL wont work.
Maven has a few plugins to generate the source code for the WSDLs, but I couldnt get it to work too (sources weren't generated or anything, probably because missing some plugin configuration or wrong ones). If someone has a working example for consuming SAP web services, please post below!
For the Java dynamic web project, we're currently using the following:
Maven 3.3.9
Java 8
Tomcat 9
VRaptor 4.2
Hibernate 5.2.9
Eclipse Neon 4.6.1
This is my pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<!-- Artifact details -->
<modelVersion>4.0.0</modelVersion>
<groupId>br.com.nooder</groupId>
<artifactId>portal</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<!-- Properties -->
<properties>
<deploy.version.log4j>2.8.2</deploy.version.log4j>
<deploy.version.vraptor>4.2.0-RC5</deploy.version.vraptor>
<deploy.version.weld>3.0.0.CR2</deploy.version.weld>
<deploy.version.hibernate>5.2.9.Final</deploy.version.hibernate>
<deploy.version.junit>4.12</deploy.version.junit>
<deploy.version.slf4j>1.7.25</deploy.version.slf4j>
</properties>
<!-- Development and production settings -->
<profiles>
<profile>
<id>tst</id>
<properties>
<deploy.enviroment>tst</deploy.enviroment>
</properties>
</profile>
<profile>
<id>prd</id>
<properties>
<deploy.enviroment>prd</deploy.enviroment>
</properties>
</profile>
</profiles>
<!-- Dependencies -->
<dependencies>
<!-- JUnit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${deploy.version.junit}</version>
</dependency>
<!-- VRaptor -->
<dependency>
<groupId>br.com.caelum</groupId>
<artifactId>vraptor</artifactId>
<version>${deploy.version.vraptor}</version>
</dependency>
<!-- VRaptor plugins -->
<dependency>
<groupId>br.com.caelum.vraptor</groupId>
<artifactId>vraptor-java8</artifactId>
<version>4.0.0.Final</version>
</dependency>
<dependency>
<groupId>br.com.caelum.vraptor</groupId>
<artifactId>vraptor-brutauth</artifactId>
<version>4.0.4</version>
</dependency>
<dependency>
<groupId>br.com.caelum.vraptor</groupId>
<artifactId>vraptor-jpa</artifactId>
<version>4.0.5</version>
</dependency>
<!--
<dependency>
<groupId>br.com.caelum.vraptor</groupId>
<artifactId>vraptor-hibernate</artifactId>
<version>4.1.0</version>
</dependency>
-->
<!-- VRaptor's dependencies: Servlet Container (Tomcat) -->
<dependency>
<groupId>org.jboss.weld.servlet</groupId>
<artifactId>weld-servlet-core</artifactId>
<version>${deploy.version.weld}</version>
<exclusions>
<exclusion>
<groupId>org.jboss.spec.javax.el</groupId>
<artifactId>jboss-el-api_3.0_spec</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.jboss.weld</groupId>
<artifactId>weld-core-impl</artifactId>
<version>${deploy.version.weld}</version>
<exclusions>
<exclusion>
<groupId>org.jboss.spec.javax.el</groupId>
<artifactId>jboss-el-api_3.0_spec</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- VRaptor's dependencies: Java 8 -->
<dependency>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.18.1-GA</version>
</dependency>
<!-- VRaptor's dependencies: Bean Validation -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator-cdi</artifactId>
<version>5.1.1.Final</version>
</dependency>
<!-- Hibernate + DB -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${deploy.version.hibernate}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>mssql-jdbc</artifactId>
<version>6.1.0.jre8</version>
</dependency>
<!-- JavaEE 8: CDI -->
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<!-- Tomcat's dependencies: JSTL -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- Maven's dependencies (?) -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.4</version>
<scope>provided</scope>
</dependency>
<!-- Expression language -->
<dependency>
<groupId>javax.el</groupId>
<artifactId>el-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<!-- Log4j 2 -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${deploy.version.log4j}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${deploy.version.log4j}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${deploy.version.log4j}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${deploy.version.slf4j}</version>
</dependency>
</dependencies>
<!-- Build -->
<build>
<finalName>portal</finalName>
<sourceDirectory>src/main/java</sourceDirectory>
<testSourceDirectory>src/test/java</testSourceDirectory>
<!-- Resources -->
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<filters>
<filter>src/main/filters/settings.${deploy.enviroment}.properties</filter>
</filters>
<plugins>
<!-- JDK Compiler Level -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<compilerArgument>-parameters</compilerArgument>
<testCompilerArgument>-parameters</testCompilerArgument>
</configuration>
</plugin>
<!-- Eclipse project -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<!-- Always download and attach dependencies source code -->
<downloadSources>true</downloadSources>
<downloadJavadocs>false</downloadJavadocs>
<!-- Avoid type mvn eclipse:eclipse -Dwtpversion=2.0 -->
<wtpversion>2.0</wtpversion>
</configuration>
</plugin>
<!-- For Maven Tomcat Plugin -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/portal</path>
</configuration>
</plugin>
</plugins>
</build>
</project>
Any input is GREATLY appreciated!