Merged revision(s) 1457809 from lucene/dev/trunk:
LUCENE-4850: Upgrade Clover version to 3.1.10 (to allow Java 7)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1457933 13f79535-47bb-0310-9956-ffa450edef68