[MPIR-279] Wrong hyperlinks on index and modules page

Fix POMs for Dependency Covergence Report: neither was the parent declared with packaging pom nor had the modules the relative path set. Thanks to Stuart McCulloch

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/branches/MPIR-279@1639324 13f79535-47bb-0310-9956-ffa450edef68