Can't cancell CONTINUOUS audit

If scheduler uses db job store, the self.scheduler is None
beacuse execute_audit is class method.
We get [] from self.scheduler.get_jobs()
and can't remove the cancelled audit.

Change-Id: I1768c847465bbefbc9794281328edb07fea83b03
Closes-Bug: #1726345

watcher/decision_engine/audit/continuous.py

@@ -66,7 +66,7 @@ class ContinuousAuditHandler(base.AuditHandler):
                 [job for job in self.scheduler.get_jobs()
                  if job.name == 'execute_audit' and
                  job.args[0].uuid == audit.uuid][0].remove()
-                return True
+            return True
 
         return False
 
@@ -131,6 +131,9 @@ class ContinuousAuditHandler(base.AuditHandler):
         scheduler_job_args = [
             job.args for job in self.scheduler.get_jobs()
             if job.name == 'execute_audit']
+        for args in scheduler_job_args:
+            if self._is_audit_inactive(args[0]):
+                scheduler_job_args.remove(args)
         for audit in audits:
             # if audit is not presented in scheduled audits yet.
             if audit.uuid not in [arg[0].uuid for arg in scheduler_job_args]:

watcher/tests/decision_engine/audit/test_audit_handlers.py

@@ -376,7 +376,7 @@ class TestContinuousAuditHandler(base.DbTestCase):
         audit_handler = continuous.ContinuousAuditHandler()
         self.audits[0].next_run_time = (datetime.datetime.now() -
                                         datetime.timedelta(seconds=1800))
-        m_is_inactive.return_value = True
+        m_is_inactive.return_value = False
         m_get_jobs.return_value = None
 
         audit_handler.execute_audit(self.audits[0], self.context)