In watcher/applier/workflow_engine/default.py, we are checking the return value of action.execute(). As the "TODO" above indicates it (line 118), we should get rid of this and only flag an action as failed if an exception was raised during its execute(). We will need to update the related unit tests. Change-Id: Ia8ff7abd9994c3504e733ccd1d629cafe9d4b839 Closes-Bug: #1548383