Update findbugs-maven-plugin to 2.5.5.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/bcel/trunk@1613504 13f79535-47bb-0310-9956-ffa450edef68
Update findbugs-maven-plugin to 2.5.4.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/bcel/trunk@1613505 13f79535-47bb-0310-9956-ffa450edef68