SOLR-6519: Add back "single" lock factory type to StandardDirectoryFactory (to prevent test randomization from failing). Should be discussed in separate issue.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625724 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6519: Also allow "single" for HDFS

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625731 13f79535-47bb-0310-9956-ffa450edef68
fix test-help documentation bug

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625788 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5945: don't hit NPE on trying to get root's fileName leading to strange test failure

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625792 13f79535-47bb-0310-9956-ffa450edef68
i before e except after c

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625795 13f79535-47bb-0310-9956-ffa450edef68
Add analytics/test-lib folder and add contents to ignore list

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625802 13f79535-47bb-0310-9956-ffa450edef68
allow for write.lock (NativeFSLF leaves this) too

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625806 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5957: Add option for tests to not randomize codec

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625812 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5958: OOM or exceptions during checkpoint make IndexWriter have a bad day

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625853 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6115: Cleanup enum/string action types in Overseer, OverseerCollectionProcessor and CollectionHandler

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625891 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6115: Fix enum usage in DeleteReplicaTest

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625897 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5960: Use a more efficient bitset, not a Set<Integer>, to track visited states

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625965 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5944: Bump version in trunk

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1625976 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/trunk' into trunk