[MPIR-313] License name is mandatory but it is not validated

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1644770 13f79535-47bb-0310-9956-ffa450edef68
Correct spelling in dependencies report: unamed => unnamed

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1644773 13f79535-47bb-0310-9956-ffa450edef68
[MPIR-319] Apache Ant has not dependency management but Apache Ivy has

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1644774 13f79535-47bb-0310-9956-ffa450edef68
Make the code more Java 5 and remove warnings from the code.


git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1644777 13f79535-47bb-0310-9956-ffa450edef68