Create missing directories when deploying with docker

Signed-off-by: Sébastien Han <sebhan@cisco.com>

tasks/docker/pre_requisite.yml

 ---
 - name: create bootstrap directories
   file:
-    path: /var/lib/ceph/bootstrap-{{ item }}
+    path: "{{ item }}"
     state: directory
   with_items:
-    - osd
-    - mds
-    - rgw
+    - /etc/ceph/
+    - /var/lib/ceph/bootstrap-osd
+    - /var/lib/ceph/bootstrap-mds
+    - /var/lib/ceph/bootstrap-rgw
 
 # NOTE (leseb): for version 1.1.0 because https://github.com/ansible/ansible-modules-core/issues/1227
 - name: install docker-py