move master actions to accept a lister, improve cluster service state execution
- master actions many times end up being executed on the cluster service, so there is no need to block them on the management thread pool to wait for a response, this remove the load on the management thread pool, and also simplifies the code implementing it
- cluster service state update exception handling was improved to include a callback when a failure happens during state update execution, this makes sure that we catch all relevant exceptions and invoke the callback, as well as simplify the code of cluster state update tasks, as they can throw failures from within the execute method and then handle them properly
Fix SimplePercolatorTests#testPercolateStatistics
Wait a bit longer for ttl to have occurred
make sure we update last failure
Add optimize thread pool (size 1) dedicated to perform explicit optimize API
Have a dedicated thread pool for explicit optimize calls (shard level optimize operations). By default, the size should be 1 to work the same with how things work currently allowing for only 1 shard level optimize on a node.

The change allows to see the optimize thread pool stats now, and potentially increase the thread pool size for beefy machines.

closes #3366
Upgrade to Lucene 4.4
Removed XPatternCaptureGroupTokenFilter
Added cluster pending tasks api.
Closes #3368
remove cached stream output
start to build the infra for simpler migration to netty 4, starting with removing the cache stream output handling as it will come built in