don't use cache for ordinals for small max ord
Term/Terms filters on numeric fields gives wrong result
fixes #2746
has_child query AVG score mode does not always work correctly
fixes #2750
Respect CandidateGenerator#size if set in the request and reduce the total #of candidates to the shard size.

Closes #2752
add release verion 4.2 to pom
Upgrade to lucene 4.2
Add tests for highlighting boost query.

Closes #1314
Fix tests since Lucene 4.2 we can support date math in Fuzzy-Search Syntax