LUCENE-4899: FastVectorHighlihgter failed with StringIndexOutOfBoundsException if a single highlight phrase or term was greater than the fragCharSize producing negative string offsets

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1465032 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-4902: Add FilterDirectoryReader

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1465072 13f79535-47bb-0310-9956-ffa450edef68
SOLR-3755: Randomizing replica creation and also avoiding same node from hosting multiple replicas for a Slice.