test-container/src/assemble/test-container.xml

<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
    <id>test-container</id>
    <formats>
        <format>dir</format>
    </formats>
    <includeBaseDirectory>false</includeBaseDirectory>

    <fileSets>
        <fileSet>
            <outputDirectory>/</outputDirectory>
            <directory>src/main/root</directory> 
       </fileSet>
    </fileSets>
    <dependencySets>
        <dependencySet>
            <outputDirectory>/lib</outputDirectory>
            <includes>
                <include>*:*</include>
           </includes>
        </dependencySet>
    </dependencySets>

</assembly>