LUCENE-5850: use correct version comparator (at the moment) for versions in index segments, otherwise this logic will do the wrong thing on the next bugfix release!

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1613988 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5593: speed up javadocs generation in build

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1614058 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6264: Distributed commit and optimize are executed serially across all replicas.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1614118 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5850: fix smoke tester to verify the index's segment versions in fact match the version being tested

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1614149 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6290: Harden and speed up CollectionsAPIAsyncDistributedZkTest

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1614194 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6261: Run ZooKeeper watch event callbacks in parallel to the ZooKeeper event thread.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1614244 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5852: log errors that occur during cleanupOldIndexFiles

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1614264 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5811, LUCENE-5788: Fix uninvertingreader to strictly follow dv api contract

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1614316 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5849: try to stress slicing better in BaseDirectoryTestCase

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1614339 13f79535-47bb-0310-9956-ffa450edef68