LUCENE-5189: factor out SegmentDocValues from SegmentReader

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535526 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5382: Maven config

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535548 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5027: Added error handling to CollapsingQParserPlugin

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535614 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5027: Maven config

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1535617 13f79535-47bb-0310-9956-ffa450edef68