Description of problem:

purging of Containerized ceph cluster setup using ansible on atomic host fails with the following error.

# ansible-playbook purge-docker-cluster.yml --skip-tags=with_pkg
Are you sure you want to purge the cluster? [no]: yes
If --skip-tags=with_pkg is not set docker packages and more will be uninstalled from non-atomic hosts. Do you want to continue?
 [no]: yes

PLAY [confirm whether user really meant to purge the cluster] ***************** 

TASK: [exit playbook, if user did not mean to purge cluster] ****************** 
skipping: [localhost]

TASK: [exit playbook, if user did not mean to remove packages] **************** 
skipping: [localhost]

PLAY [purge ceph mds cluster] ************************************************* 
skipping: no hosts matched

PLAY [purge ceph rgw cluster] ************************************************* 
skipping: no hosts matched

PLAY [purge ceph rbd-mirror cluster] ****************************************** 
skipping: no hosts matched

PLAY [purge ceph nfs cluster] ************************************************* 
skipping: no hosts matched

PLAY [purge ceph osd cluster] ************************************************* 

GATHERING FACTS *************************************************************** 
ok: [10.70.37.43]
ok: [10.70.37.89]
ok: [10.70.37.211]

TASK: [include_vars ../roles/ceph-common/defaults/main.yml] ******************* 
failed: [10.70.37.211] => {"failed": true, "file": "/root/roles/ceph-common/defaults/main.yml"}
msg: Source file not found.
failed: [10.70.37.89] => {"failed": true, "file": "/root/roles/ceph-common/defaults/main.yml"}
msg: Source file not found.
failed: [10.70.37.43] => {"failed": true, "file": "/root/roles/ceph-common/defaults/main.yml"}
msg: Source file not found.

FATAL: all hosts have already failed -- aborting

PLAY RECAP ******************************************************************** 
           to retry, use: --limit @/root/purge-docker-cluster.retry

10.70.37.211               : ok=1    changed=0    unreachable=0    failed=1   
10.70.37.43                : ok=1    changed=0    unreachable=0    failed=1   
10.70.37.89                : ok=1    changed=0    unreachable=0    failed=1   
localhost                  : ok=0    changed=0    unreachable=0    failed=0   


Version-Release number of selected component (if applicable):
ansible --version
ansible 1.9.4
  configured module search path = None

#docker --version
Docker version 1.10.3, build 5206701-unsupported

# cat /etc/redhat-release 
Red Hat Enterprise Linux Atomic Host release 7.2


How reproducible:
Always

Steps to Reproduce:
1. setup a containerized ceph cluster using ansible - https://docs.google.com/document/d/1Ef5a_-Yjozy5Ue3C0M7mMQNn6zWZe0-514bhxKwFHI8/edit#

2. Once the setup is complete, purge the cluster using the command - purge-docker-cluster.yml --skip-tags=with_pkg

Actual results:
Purging fails

Expected results:
Purging should pass

Additional info: