Restart only when needed

The role currently always restarts Magnum at the end
of every run which is not ideal.

This patch removes the restart at every run and adds
a notify for configuration changes.

Change-Id: Ia47d9983598598b5550d623df78aae616d8948a4

tasks/magnum_post_install.yml

@@ -35,6 +35,8 @@
       destination: "{{ magnum_etc_directory }}/api-paste.ini"
       config_overrides: "{{ magnum_api_paste_ini_overrides }}"
       config_type: "ini"
+  notify:
+    - Restart magnum services
 
 - name: Download magnum images
   get_url:

tasks/main.yml

@@ -49,15 +49,5 @@
   tags:
     - magnum-config
 
-- name: Restart Magnum Services
-  service:
-    name: "{{ item }}"
-    state: "restarted"
-  with_items:
-    - "{{ magnum_api_program_name }}"
-    - "{{ magnum_conductor_program_name }}"
-  tags:
-    - magnum-config
-
 - name: Flush handlers
   meta: flush_handlers