scenario001/pingtest: remove gnocchi_res_alarm

The resource is failing and it prevents us to add more coverage. Until
we figure what's wrong with it, let's disable it.

Change-Id: If89775bf67d686327d0d27222e0c9179be74a668

ci/pingtests/scenario001-multinode.yaml

@@ -118,19 +118,21 @@ resources:
       ram: 512
       vcpus: 1
 
-  gnocchi_res_alarm:
-    type: OS::Aodh::GnocchiResourcesAlarm
-    properties:
-      description: Do stuff with gnocchi
-      metric: cpu_util
-      aggregation_method: mean
-      granularity: 60
-      evaluation_periods: 1
-      threshold: 50
-      alarm_actions: []
-      resource_type: instance
-      resource_id: { get_resource: server1 }
-      comparison_operator: gt
+# Disabling this resource now
+# https://bugs.launchpad.net/tripleo/+bug/1646506
+#  gnocchi_res_alarm:
+#    type: OS::Aodh::GnocchiResourcesAlarm
+#    properties:
+#      description: Do stuff with gnocchi
+#      metric: cpu_util
+#      aggregation_method: mean
+#      granularity: 60
+#      evaluation_periods: 1
+#      threshold: 50
+#      alarm_actions: []
+#      resource_type: instance
+#      resource_id: { get_resource: server1 }
+#      comparison_operator: gt
 
   asg:
     type: OS::Heat::AutoScalingGroup