Re-enable ceilometer alarm test

Behavior ought to be fixed in Ceilometer.

Depends-On: I88cbd83910dcf79bed8a0f9616f98e4346362ab3
Change-Id: Ie73bb42ff5ab4552618a758490605daa59823c28

heat_integrationtests/scenario/test_ceilometer_alarm.py

@@ -36,7 +36,6 @@ class CeilometerAlarmTest(test.HeatIntegrationTest):
 
     def test_alarm(self):
         """Confirm we can create an alarm and trigger it."""
-        self.skipTest('Until bug 1468697 is fixed')
 
         # 1. create the stack
         stack_identifier = self.stack_create(template=self.template)