Description of problem:
======================
client installation is failing as below

TASK: [ceph-common | get ceph version] **************************************** 
<magna063> REMOTE_MODULE command ceph --version
<magna100> REMOTE_MODULE command ceph --version
failed: [magna100] => {"changed": false, "cmd": "ceph --version", "failed": true, "rc": 2}
msg: [Errno 2] No such file or directory
ok: [magna063] => {"changed": false, "cmd": ["ceph", "--version"], "delta": "0:00:00.071293", "end": "2016-05-11 19:43:10.885875", "rc": 0, "start": "2016-05-11 19:43:10.814582", "stderr": "", "stdout": "ceph version 10.2.0-1.el7cp (3a9fba20ec743699b69bd0181dd6c54dc01c64b9)", "stdout_lines": ["ceph version 10.2.0-1.el7cp (3a9fba20ec743699b69bd0181dd6c54dc01c64b9)"], "warnings": []}



Version-Release number of selected component (if applicable):
=============================================================
ceph-ansible-1.0.5-10.el7scon.noarch



How reproducible:
=================
always


Steps to Reproduce:
===================
1. create ceph cluster on rhel machine using ceph ansible.(1 mon, 3osd node each having 3 osds)
2. copy admin keyring on client node
3. make entry in inventory file
[clients]
<client-host-name>
4. update site.yml 

- hosts: clients
  become: True
  roles:
  - ceph-common
5. re run ceph-ansible command used for installation(arguments were given via command line)

Actual results:
===============
TASK: [ceph-common | get ceph version] **************************************** 
<magna063> REMOTE_MODULE command ceph --version
<magna100> REMOTE_MODULE command ceph --version
failed: [magna100] => {"changed": false, "cmd": "ceph --version", "failed": true, "rc": 2}
msg: [Errno 2] No such file or directory
ok: [magna063] => {"changed": false, "cmd": ["ceph", "--version"], "delta": "0:00:00.071293", "end": "2016-05-11 19:43:10.885875", "rc": 0, "start": "2016-05-11 19:43:10.814582", "stderr": "", "stdout": "ceph version 10.2.0-1.el7cp (3a9fba20ec743699b69bd0181dd6c54dc01c64b9)", "stdout_lines": ["ceph version 10.2.0-1.el7cp (3a9fba20ec743699b69bd0181dd6c54dc01c64b9)"], "warnings": []}




PLAY RECAP ******************************************************************** 
           to retry, use: --limit @/root/site.retry

magna063                   : ok=304  changed=0    unreachable=0    failed=0   
magna084                   : ok=84   changed=0    unreachable=0    failed=0   
magna085                   : ok=245  changed=0    unreachable=0    failed=0   
magna090                   : ok=157  changed=0    unreachable=0    failed=0   
magna100                   : ok=22   changed=0    unreachable=0    failed=1  


ceph packages were not installed on client