Merge branch 'stable-2.15'
* stable-2.15:
Remove redundant type arguments
Avoid creating unnecessary array
Adjust tests
Enable more compiler warnings in Eclipse
ForwardedIndexingHandler: Make doDelete abstract
JGroupsPeerInfoProvider: Remove unnecessarily nested else block
ForwardedCacheEvictionHandler#evict: Fix Javadoc
Remove class PeerInfoProvider
Make PluginConfigPeerInfoProvider a singleton
Adjust queue names to match core Gerrit convention
Change-Id: Iefdad3c75af7e701018daa5010faefc126e9bab2