Update versions of Maven plugins and dependencies; use primes code in Commons Math instead of old custom code

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1465367 13f79535-47bb-0310-9956-ffa450edef68
Mahout-1187: Update Commons Lang to Commons Lang3

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1465425 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/trunk' into trunk