[MPIR-295] Enhancements on dependency convergence report

Submitted by: Simon Wang <wangyf2010@gmail.com>
From: https://github.com/apache/maven-plugins/pull/23

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1601206 13f79535-47bb-0310-9956-ffa450edef68