LUCENE-5186: Added CachingWrapperFilter.getFilter.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1516773 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5143: tests - avoid too large of a tree for a single block

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1516847 13f79535-47bb-0310-9956-ffa450edef68