MAHOUT-1292: Minor cleanups

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1544371 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1292: Minor cleanup

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1544373 13f79535-47bb-0310-9956-ffa450edef68
MAHOUT-1308: Cannot extend CandidateItemsStrategy due to restricted visibility

git-svn-id: https://svn.apache.org/repos/asf/mahout/trunk@1544380 13f79535-47bb-0310-9956-ffa450edef68