Fix /etc/kolla permission

Add preceding 0 to the permission, otherwise it will be regard as decimal.

TrivialFix

Change-Id: I762b38a71143df9f378f74e534643534f2bc68b8

ansible/roles/baremetal/tasks/pre-install.yml

@@ -123,7 +123,7 @@
     recurse: yes
     owner: kolla
     group: kolla
-    mode: 755
+    mode: 0755
   become: True
   when: create_kolla_user | bool == True
 
@@ -132,6 +132,6 @@
     path: /etc/kolla
     state: directory
     recurse: yes
-    mode: 666
+    mode: 0666
   become: True
   when: create_kolla_user | bool == False