LUCENE-6038: Re-enable FieldValueFilter optimizations based on the way the docsWithField bits are implemented.


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_5x@1636828 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-6046: let this test determinize massive automata

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_5x@1636831 13f79535-47bb-0310-9956-ffa450edef68