Description of problem:
Deploy CNS met undefined variable issue during set heketi-cli command.

Version-Release number of the following components:
openshift-ansible-3.11.0-0.13.0.git.0.16dc599None.noarch
ansible-2.6.2-1.el7ae.noarch

How reproducible:
100%

Steps to Reproduce:
1. Deploy CNS with OCP
2.
3.

Actual results:
# ansible-playbook -i hosts -vv /usr/share/ansible/openshift-ansible/playbooks/deploy_cluster.yml
...
TASK [openshift_storage_glusterfs : Set heketi-cli command] ********************
Monday 13 August 2018  15:19:06 +0800 (0:00:00.069)       0:23:07.760 ********* 
fatal: [qe-weshi-cns-master.example.com]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute 'results'\n\nThe error appears to have been in '/usr/share/ansible/openshift-ansible/roles/openshift_storage_glusterfs/tasks/heketi_load.yml': line 2, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n---\n- name: Set heketi-cli command\n  ^ here\n"}
...

Expected results:
This task should pass without error.

Additional info: