Autocreate CephAnsibleFetchDirectoryBackup

Originally the playbook failed to make user aware that they need
to create the CephAnsibleFetchDirectoryBackup. However, if they
specified the path, then they should know about the directory.
Autocreate it so that the user only needs to specify a path.

Change-Id: I06eca1cf8987c9366492973cbe861e1a6b47f744

docker/services/ceph-ansible/ceph-base.yaml

@@ -482,9 +482,11 @@ outputs:
                 stat: path="{{local_ceph_ansible_fetch_directory_backup}}"
                 register: local_backup_directory
                 ignore_errors: True
-              - name: ensure requested local back up directory exists
-                fail:
-                  msg: "Process runing Ansible is unable to stat LocalCephAnsibleFetchDirectoryBackup: {{local_ceph_ansible_fetch_directory_backup}}"
+              - name: autocreate new directory for ceph-ansible fetch directory backup
+                file:
+                  path: "{{local_ceph_ansible_fetch_directory_backup}}"
+                  state: directory
+                  mode: 0700
                 when: local_backup_directory.stat.exists == False
               - name: look for tarball of ceph-ansible fetch directory in local backup
                 stat: path="{{local_ceph_ansible_fetch_directory_backup}}/{{ceph_ansible_tarball_name}}"