manager allowing XTS participant recovery moduels to be registered at startup and unregistered at shutdown.
note that these are the recovery modules which drive XTS participant recovery. if participant recovery is
configured then this will include the participant recovery modules which drive calls to application
specific recovery modules registered by participant web services.
the list of XTS recovery modules actually registered with the JBossTS recovery manager
flag to identify if we have already been initialised
initialisation routine which registers all configured XTS recovery modules
shutdown routine which removes all installed recovery modules