Fix file handle leak in URLBlobContainer
Fix possible race condition during snapshot deletion
remove deprecated method usage with jackson
Include inner classes in the test package as well
move bloom filter class to a more common package
multi_match query supports fields as single string and array

The multi_match query accepted only an array in the fields parameter. This patch allows to use a single string as well.

Also added tests for parsing in both cases.

Closes #4164
Indices query/filter skip parsing altogether for irrelevant indices when possible

Closes #2416
Minor improvements to indices filter and query & updated docs

Slightly simplified indices filter and query parsers code
Trimmed down tests where possible
Trimmed down MatchedQueriesTests
Added support for _name parameter in indices filter

Closes #4166
Fix possible NPE in snapshot/restore during node shutdown
fix failed compilation under jdk 6
Refactored indices aliases api to make use of the new recently introduced generic ack mechanism

Closes #4114
Improve snapshot/restore test speed