Added action_plan.create|update|delete notifs

In this changeset, I added 3 notifications:

- action_plan.create
- action_plan.update
- action_plan.delete

Partially Implements: blueprint action-plan-versioned-notifications-api

Change-Id: I8821fc6f47e7486037839d81bed9e28020b02fdd

watcher/tests/decision_engine/audit/test_audit_handlers.py

@@ -175,12 +175,19 @@ class TestAutoTriggerActionPlan(base.DbTestCase):
         self.ongoing_action_plan = obj_utils.create_test_action_plan(
             self.context,
             uuid=uuidutils.generate_uuid(),
-            audit_id=self.audit.id)
+            audit_id=self.audit.id,
+            strategy_id=self.strategy.id,
+            audit=self.audit,
+            strategy=self.strategy,
+        )
         self.recommended_action_plan = obj_utils.create_test_action_plan(
             self.context,
             uuid=uuidutils.generate_uuid(),
             state=objects.action_plan.State.ONGOING,
-            audit_id=self.audit.id
+            audit_id=self.audit.id,
+            strategy_id=self.strategy.id,
+            audit=self.audit,
+            strategy=self.strategy,
         )
 
     @mock.patch.object(objects.action_plan.ActionPlan, 'list')