Description of problem:
Trigger a containerized installation on RHEL (firewalld not installed), installer would fail at "Start and enable firewalld service"

Version-Release number of selected component (if applicable):
openshift-ansible-3.5.0-1.git.0.847bfb9.el7.noarch.rpm

How reproducible:
always

Steps to Reproduce:
1. Trigger a containerized installation on RHEL (firewalld not installed)


Actual results:
TASK [os_firewall : Install firewalld packages] ********************************
Monday 16 January 2017  02:15:08 +0000 (0:00:00.121)       0:00:34.161 ******** 
skipping: [ec2-54-221-84-253.compute-1.amazonaws.com] => {"changed": false, "skip_reason": "Conditional check failed", "skipped": true}

TASK [os_firewall : Ensure iptables services are not enabled] ******************
Monday 16 January 2017  02:15:09 +0000 (0:00:00.168)       0:00:34.329 ******** 

ok: [ec2-54-221-84-253.compute-1.amazonaws.com] => (item=iptables) => {"failed": false, "failed_when_result": false, "item": "iptables", "msg": "Could not find the requested service \"'iptables'\": "}
ok: [ec2-54-221-84-253.compute-1.amazonaws.com] => (item=ip6tables) => {"failed": false, "failed_when_result": false, "item": "ip6tables", "msg": "Could not find the requested service \"'ip6tables'\": "}

TASK [os_firewall : Start and enable firewalld service] ************************
Monday 16 January 2017  02:15:10 +0000 (0:00:01.290)       0:00:35.620 ******** 

fatal: [ec2-54-221-84-253.compute-1.amazonaws.com]: FAILED! => {"changed": false, "failed": true, "msg": "Could not find the requested service \"'firewalld'\": "}

Expected results:
Firewalld should be installed at task "Install firewalld packages"

Additional info: