[tls] Make a cert SLS IDs globally unique

At the moment most of openstack formulas have
the same ids of certs at state files, e.g.:

 nova/server.sls   - rabbitmq_ca : file_managed
 glance/server.sls - rabbitmq_ca : file_managed

So, any attempt to use the:

   salt-call state.apply

fails with:

  Detected conflicting IDs, SLS IDs need to be
  globally unique.

Change-Id: If8f706089c4d27eac07a197666572a199565bc87
diff --git a/designate/server.sls b/designate/server.sls
index ee20f54..df50a0b 100644
--- a/designate/server.sls
+++ b/designate/server.sls
@@ -66,7 +66,7 @@
     - watch:
       - file: /etc/designate/designate.conf
       {%- if server.message_queue.get('ssl',{}).get('enabled', False) %}
-      - file: rabbitmq_ca
+      - file: rabbitmq_ca_designate_server
       {%- endif %}
       {%- if server.database.get('ssl',{}).get('enabled', False) %}
       - file: mysql_ca_designate_server
@@ -94,7 +94,7 @@
 {%- endif %}
 
 {%- if server.message_queue.get('ssl',{}).get('enabled', False) %}
-rabbitmq_ca:
+rabbitmq_ca_designate_server:
 {%- if server.message_queue.ssl.cacert is defined %}
   file.managed:
     - name: {{ server.message_queue.ssl.cacert_file }}