Clean up: move exception throwing out of the constructors.
Remove ' as they break formatting of log messages
clean up: remove loads of duplicate code
JBPAPP6-1393 Fix backup bridge deployment: deploy&start bridges on clusterManager.activate()

https://bugzilla.redhat.com/show_bug.cgi?id=900764
Turn off failureCheckAndFlushThread when freezing the connections.
Also remove a duplicate check on "started" at stop().
Merge pull request #969 from clebertsuconic/francisco-bridge

Sending francisco's commits after a few minor changes