Merge pull request #921 from clebertsuconic/master

another test fix avoiding NPE on queue
added global netty worker pool
Merge pull request #923 from andytaylor/master

added global netty worker pool
HORNETQ-720 Move some replication specific actions to after the cluster shutdown
maven: upgrade findbugs and checkstyle plugins
add netty global boss pool
only call releaseExternalResources when not using shared pools
Merge pull request #924 from FranciscoBorges/stop-stable

Avoid stopping the replicationManager too soon
Merge pull request #925 from andytaylor/master

added global netty boss pool