SOLR-6291: RollingRestartTest is too slow.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617482 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5864: Split BytesRef into BytesRef and BytesRefBuilder.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1617493 13f79535-47bb-0310-9956-ffa450edef68