Clean up IndicesResource
Obey index prefixes in index and deflector operations

Check the validity of indices in IndicesResource before operating on them.

Fixes #689
Fix newly introduced NPE Deflector#getAllDeflectorIndexNames (duh!)
Improve test coverage of Deflector
Bumping version number.
Bumping version to beta 4 snapshot.
Upgrade to Joda-Time 2.4

Related upgrade notes: http://www.joda.org/joda-time/upgradeto240.html
Fix maven-site-plugin reporting
Upgrade to Netty 3.9.3.Final
Upgrade to Glassfish HK2 2.3.0
Upgrade to TestNG 6.8.8
Upgrade to Jackson 2.4.2
Upgrade to SLF4J 1.7.7
Upgrade to Apache HttpClient 4.3.5
Upgrade to Apache Commons Codec 1.9
Upgrade to Apache Commons Email 1.3.3
Upgrade to JCommander 1.35
Upgrade to Reflections 0.9.9-RC2
Remove explicit version declarations in graylog2-rest-routes
Upgrade to MongoDB Java Driver 2.12.3