Made the adress of the database dynamic

With dynamic, i mean that it is retreived from the database host

roles/keystone/tasks/main.yml

@@ -23,7 +23,7 @@
 
 - name: install service file.
   template:
-    src: files/keystone.service
+    src: templates/keystone.service
     dest: /etc/systemd/system/keystone.service
     mode: 644
     owner: root
@@ -42,7 +42,8 @@
 
 - name: keystone manage commands to setup db
   command: >
-             /usr/bin/docker run --rm --add-host="mariadb:172.23.38.125"
+             /usr/bin/docker run --rm
+             --add-host=mariadb:{{ hostvars[groups['databases'][0]]['ansible_default_ipv4']['address'] }}
              -v /srv/keystone/fernet-keys:/etc/keystone/fernet-keys
              hpc/keystone keystone-manage {{ item }}
   with_items: