Merged revision(s) 1460042 from lucene/dev/trunk:
Javadocs bugs seem to be fixed in Java 8 b82. Reenable Javadocs linting on Java 8.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1460043 13f79535-47bb-0310-9956-ffa450edef68