Update maven-pmd-plugin to 3.2 from 3.1.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1619298 13f79535-47bb-0310-9956-ffa450edef68
Update findbugs-maven-plugin to 2.5.5 from 2.5.4.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1619305 13f79535-47bb-0310-9956-ffa450edef68