Make the aodh support deploy separated

refer to [0]

[0]: https://github.com/openstack/kolla-ansible/blob/master/ansible/inventory/multinode#L557

Change-Id: I17ac982ddcb6c63d5ca30623fc450464a69b9299
Closes-Bug: #1796366

ansible/site.yml

@@ -822,7 +822,10 @@
 - name: Apply role aodh
   gather_facts: false
   hosts:
-    - aodh
+    - aodh-api
+    - aodh-evaluator
+    - aodh-listener
+    - aodh-notifier
   serial: '{{ kolla_serial|default("0") }}'
   roles:
     - { role: aodh,