[upgrade.yml] Factorize tasks upgrading ownCloud

upgrade.yml

@@ -20,14 +20,14 @@
       until: apt_result is succeeded
 
 - hosts: owncloud-srv.adm.crans.org
+  become_user: www-data
+  become: yes
   vars:
     # Owncloud command line interface
     occ_bin: '/var/www/owncloud/occ'
   tasks:
     - name: Upgrade owncloud
       command: "{{ occ_bin }} upgrade"
-      become: yes
-      become_user: www-data
       register: upgrade_owncloud
       failed_when:
         # occ return code is 3 when ownCloud is already latest version
@@ -43,8 +43,6 @@
 
     - name: Disable maintenance mode
       command: "{{ occ_bin }} maintenance:mode --off"
-      become: yes
-      become_user: www-data
       when:
         # Maintenance mode has not been enabled.
         - upgrade_owncloud.rc != 3