LUCENE-5757: move RamUsageEstimator reflector to test-framework

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1602515 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5426: Fixed a bug in ReverseWildCardFilter that could cause InvalidTokenOffsetsException when highlighting

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1602525 13f79535-47bb-0310-9956-ffa450edef68