List<MavenProject> reactorProjects = createReactorProjects( "interpolated-versions" );
ReleaseDescriptor config = createDescriptorFromProjects( reactorProjects );
config.mapReleaseVersion( "groupId:artifactId", NEXT_VERSION );
config.mapReleaseVersion( "groupId:subproject1", ALTERNATIVE_NEXT_VERSION );
config.mapReleaseVersion( "groupId:subproject2", NEXT_VERSION );
config.mapReleaseVersion( "groupId:subproject3", NEXT_VERSION );
phase.execute( config, new DefaultReleaseEnvironment(), reactorProjects );
for ( Iterator<MavenProject> i = reactorProjects.iterator(); i.hasNext(); )