Fix kolla-ansible genconfig for mariadb

For the genconfig command, master_host will not be defined as it is
defined dynamically in bootstrap.yml.

Co-Authored-By: Stig Telfer <stig@stackhpc.com>
Change-Id: Ib988c8e2de475e9b973fed2f7f752cb2500953c3
Closes-Bug: #1707856

ansible/roles/mariadb/handlers/main.yml

@@ -53,6 +53,7 @@
     image: "{{ service.image }}"
     volumes: "{{ service.volumes }}"
   when:
+    - action != "config"
     - inventory_hostname != master_host
     - inventory_hostname in groups[service.group]
     - service.enabled | bool
@@ -78,6 +79,7 @@
   retries: 10
   delay: 6
   when:
+    - action != "config"
     - inventory_hostname != master_host
 
 - name: restart master mariadb
@@ -92,6 +94,7 @@
     image: "{{ service.image }}"
     volumes: "{{ service.volumes }}"
   when:
+    - action != "config"
     - inventory_hostname == master_host
     - inventory_hostname in groups[service.group]
     - service.enabled | bool
@@ -117,4 +120,5 @@
   retries: 10
   delay: 6
   when:
+    - action != "config"
     - inventory_hostname == master_host