Deprecate managing of rabbitmq resources

We stopped to manage rabbitmq resources from openstack puppet
modules a long time ago, but manila module still contains
rabbitmq class for its managing. This patch deprecates it.

Change-Id: Ica717e76374359f8eb3a4e2f0c06fff48fd05b2d

manifests/rabbitmq.pp

@@ -37,6 +37,8 @@ class manila::rabbitmq(
   $port           = '5672',
 ) {
 
+  warning('manila::rabbitmq class is deprecated and will be removed in next release. Make other plans to configure rabbitmq resources.')
+
   if ($enabled) {
     if $userid == 'guest' {
       $delete_guest_user = false

releasenotes/notes/deprecate_managing_rabbit_resources-4e72b17c47efacb1.yaml

@@ -0,0 +1,4 @@
+---
+deprications:
+  - Deprecated managing of rabbit resources.
+    It will be dropped in the next release.es the prelude.