Increase robustness of WBE message and request processing

When a notification request/response can't be processed ensure
we log an error message at the same level as the other function
that sends back responses.

Also adds in a return boolean from the _reply message (which
is used for the X number of replies to a servers task request)
function and use this boolean to determine if the worker should
attempt to perform the final handler call that activates the
desired task.

Change-Id: I7f3914c126f39c56d0d2e3dfe02f3b112391ff43
Merge "Increase robustness of WBE message and request processing"