OR-758 Use user notification for external notification API
OR-758 update unit-test for new behavior
OR-758 update midway tests for new behavior
Merge pull request #561 in OR/rse from ~RPIGNOLET/rse:OR-758 to master

* commit '5188804fd4aa96b0ed3de23ec0c1e51d2418a3cb':
  OR-758 update midway tests for new behavior
  OR-758 update unit-test for new behavior
  OR-758 Use user notification for external notification API