SOLR-5715 CloudSolrServer should choose URLs that match _route_ 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1579897 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5893 On restarting overseer designate , move itself to front of the queue

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1579901 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5489: add Rescorer/QueryRescorer

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LUCENE-5489: add changes

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1579914 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5489: fix test bug

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1579948 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5865: Testing improvements.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1579951 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5860: Use leaderConflictResolveWait in WaitForState during recovery/startup, improve logging and force refresh cluster state every 15 seconds

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1579954 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5544: Exceptions during IW.rollback can leak files and locks

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