Rename enable_cancel_on_failover parameter

... so that users can more easily guess that the parameter is related
to rabbitmq.

Change-Id: I9a040d19cc1834b08e744dbedc560fa59500a229

manifests/init.pp

@@ -83,7 +83,7 @@
 #   (Optional) Limit the number of memory bytes used by the quorum queue.
 #   Defaults to $facts['os_service_default']
 #
-# [*enable_cancel_on_failover*]
+# [*rabbit_enable_cancel_on_failover*]
 #   (Optional) Enable x-cancel-on-ha-failover flag so that rabbitmq server will
 #   cancel and notify consumers when queue is down.
 #   Defaults to $facts['os_service_default']
@@ -185,7 +185,7 @@ class ceilometer(
   $rabbit_quorum_delivery_limit       = $facts['os_service_default'],
   $rabbit_quorum_max_memory_length    = $facts['os_service_default'],
   $rabbit_quorum_max_memory_bytes     = $facts['os_service_default'],
-  $enable_cancel_on_failover          = $facts['os_service_default'],
+  $rabbit_enable_cancel_on_failover   = $facts['os_service_default'],
   $rabbit_heartbeat_timeout_threshold = $facts['os_service_default'],
   $rabbit_heartbeat_rate              = $facts['os_service_default'],
   $rabbit_heartbeat_in_pthread        = $facts['os_service_default'],
@@ -236,7 +236,7 @@ class ceilometer(
     rabbit_quorum_delivery_limit    => $rabbit_quorum_delivery_limit,
     rabbit_quorum_max_memory_length => $rabbit_quorum_max_memory_length,
     rabbit_quorum_max_memory_bytes  => $rabbit_quorum_max_memory_bytes,
-    enable_cancel_on_failover       => $enable_cancel_on_failover,
+    enable_cancel_on_failover       => $rabbit_enable_cancel_on_failover,
   }
 
   # Once we got here, we can act as an honey badger on the rpc used.

releasenotes/notes/enable_cancel_on_failover-ad0b5d746db12146.yaml

@@ -1,4 +1,5 @@
 ---
 features:
   - |
-    The new ``ceilometer::enable_cancel_on_failover`` parameter has been added.
+    The new ``ceilometer::rabbit_enable_cancel_on_failover`` parameter has been
+    added.