Monasca API uses new config file name

fix monasca api warning,the new config file name is api.conf

Change-Id: Iabfbeab45d4e16602781d5fdf1ff0b2b67168d77
Closes-Bug: #1784656

ansible/roles/monasca/tasks/config.yml

@@ -40,7 +40,7 @@
   become: true
   register: monasca_api_confs
   with_items:
-    - api-config.conf
+    - api.conf
     - api-config.ini
   when:
     - inventory_hostname in groups[service['group']]

ansible/roles/monasca/templates/monasca-api/monasca-api.json.j2

@@ -4,8 +4,8 @@
     "command": "/usr/sbin/{{ monasca_cmd }} -DFOREGROUND",
     "config_files": [
         {
-            "source": "{{ container_config_directory }}/api-config.conf",
-            "dest": "/etc/monasca/api-config.conf",
+            "source": "{{ container_config_directory }}/api.conf",
+            "dest": "/etc/monasca/api.conf",
             "owner": "monasca",
             "perm": "0600"
         },