[MPMD-163] PMD issues are reported multiple times
Submitted by Mirko Friedenhagen.

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1447809 13f79535-47bb-0310-9956-ffa450edef68
add contributor

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1447810 13f79535-47bb-0310-9956-ffa450edef68
add it for MPMD-163

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1447811 13f79535-47bb-0310-9956-ffa450edef68