Add a bean method to report whether or not all XAResources were contaced during the last recovery scan

There are some recovery manager use cases where the user needs to know that all orphans have been detected (for example it is possible that some registered resource managers were not contactable during the last scan).

This feature would be particularly useful when running on OpenShift in order to determine when it is safe to scale down and reclaim the space used by a pod.

The proposal is to validate that the recover() method was successfully invoked on all currently registered resources. The proposed new method should report whether or not there were any errors or warnings during last recovery scan made by the XARecoveryModule.