Log Message:
Update databases/elasticsearch to 2.3.3.

== 2.3.3 Release Notes

=== New features

Geo::
- Add CONTAINS relation to geo_shape query

=== Enhancements

Core::
- Kill thread local leak

REST::
- CORS handling triggered whether User-Agent is a browser or not

=== Bug fixes

Core::
- Don't try to compute completion stats on a reader after we
  already closed it

Highlighting::
- Exclude all but string fields from highlighting if wildcards are
  used...

Query DSL::
- Fix NullPointerException in SimpleQueryParser when analyzing
  text produces a null query

REST::
- CORS should permit same origin requests
- Allow CORS requests to work with HTTP compression enabled

=== Upgrades

Internal::
- Update Jackson 2.6.2 -> 2.6.6 (latest and final 2.6 patch)