When copying glance-swift.conf ensure mode and become used

This makes it so that the file copied has the same perms
as the other copied files and that become is used so that the
copy works (otherwise it does not).

Change-Id: I22f39ef30760701e174f304de6ff959ff60607ad

ansible/roles/glance/tasks/config.yml

@@ -86,6 +86,8 @@
       - "{{ node_custom_config }}/glance/glance-swift.conf"
       - "{{ node_custom_config }}/glance/{{ inventory_hostname }}/glance-swift.conf"
     dest: "{{ node_config_directory }}/glance-api/glance-swift.conf"
+    mode: "0660"
+  become: true
   register: glance_swift_conf
   when:
     - glance_api.enabled | bool