minor optimization

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1534787 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5300: Check that the supplied hash ranges actually cover the entire range of the shard

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1534974 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5363: Solr doesn't start up properly with Log4J2

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535065 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5380: Using cloudSolrServer.setDefaultCollection(collectionId) does not work as intended for an alias spanning more than 1 collection.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535076 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5382: Update to Hadoop 2.2 GA release.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535083 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5303: OrdinalsCache should use reader.getCoreCacheKey()

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535163 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5382: Update protobuf checksum

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535195 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5384: randomlyEnableAutoSoftCommit in ChaosMonkeySafeLeaderTest is buggy.

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535204 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5027 CollapsingQParserPlugin

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535208 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5303: clear cache before each test

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535215 13f79535-47bb-0310-9956-ffa450edef68
refactor Collector interface for lock-free parallelizability
parallelize TopScoreDocCollector
parallelize FacetsCollector
parallelize TopFieldCollector
fix javadoc warnings
parallellize DocSetCollector