Description of problem:
Install glusterfs on an existing gluster. The playbook failed.

Version-Release number of the following components:
rpm -q openshift-ansible
[fedora@ip-172-31-33-174 openshift-ansible]$ git log --oneline -1
cddde04a8 (HEAD -> master, origin/master, origin/HEAD) Merge pull request #5735 from ingvagabund/default-oo_new_etcd_to_config-to-empty-list

rpm -q ansible
ansible-2.3.2.0-1.fc26.noarch

ansible --version
ansible 2.3.2.0
  config file = /home/fedora/openshift-ansible/ansible.cfg
  configured module search path = Default w/o overrides
  python version = 2.7.13 (default, Sep  5 2017, 08:53:59) [GCC 7.1.1 20170622 (Red Hat 7.1.1-3)]


How reproducible:
1 master, 1 infra, 2 compute nodes


Steps to Reproduce:
1. openshift-ansible/playbooks/byo/config.yml to install openshift cluster without glusterfs
2. add glusterfs relevant parts into inv. file
3. openshift-ansible/playbooks/byo/openshift-glusterfs/config.yml to install glusterfs

Actual results:
2017-10-13 19:18:39,722 p=14236 u=fedora |  TASK [openshift_storage_glusterfs : Deploy deploy-heketi pod] *****************************************************************
2017-10-13 19:18:39,722 p=14236 u=fedora |  task path: /home/fedora/openshift-ansible/roles/openshift_storage_glusterfs/tasks/heketi_deploy_part1.yml:18
2017-10-13 19:18:39,758 p=14236 u=fedora |  Using module file /home/fedora/openshift-ansible/roles/lib_openshift/library/oc_process.py
2017-10-13 19:18:40,571 p=14236 u=fedora |  fatal: [ec2-54-213-229-145.us-west-2.compute.amazonaws.com]: FAILED! => {
    "changed": false, 
    "failed": true, 
    "module_stderr": "Shared connection to ec2-54-213-229-145.us-west-2.compute.amazonaws.com closed.\r\n", 
    "module_stdout": "Traceback (most recent call last):\r\n  File \"/tmp/ansible_jK4C_k/ansible_module_oc_process.py\", line 1635, in <module>\r\n    main()\r\n  File \"/tmp/ansible_jK4C_k/ansible_module_oc_process.py\", line 1628, in main\r\n    rval = OCProcess.run_ansible(module.params, module.check_mode)\r\n  File \"/tmp/ansible_jK4C_k/ansible_module_oc_process.py\", line 1584, in run_ansible\r\n    all_results = ocprocess.needs_update()\r\n  File \"/tmp/ansible_jK4C_k/ansible_module_oc_process.py\", line 1503, in needs_update\r\n    for obj in self.template:\r\n  File \"/tmp/ansible_jK4C_k/ansible_module_oc_process.py\", line 1449, in template\r\n    raise OpenShiftCLIError('Error processing template [%s]: %s' %(self.name, results))\r\n__main__.OpenShiftCLIError: Error processing template [deploy-heketi]: {'cmd': '/usr/bin/oc process deploy-heketi -v HEKETI_USER_KEY=/trpuz0MMFHWuPZqq0YX2sUL1xya9ybbLaraKpLWyMU= IMAGE_VERSION=latest HEKETI_KUBE_NAMESPACE=glusterfs HEKETI_ADMIN_KEY=2zTf7a3qmLFy8/1pqRKT5JrQ8I7HK9dP+bBgksNkmXs= IMAGE_NAME=rhgs3/rhgs-volmanager-rhel7 CLUSTER_NAME=storage HEKETI_ROUTE=heketi-storage HEKETI_EXECUTOR=kubernetes -n glusterfs', 'returncode': 1, 'results': {}, 'stderr': u'Flag --value has been deprecated, Use -p, --param instead.\\nerror: unable to process template\\n  Required value: template.parameters[8]: parameter TOPOLOGY_PATH is required and must be specified\\n', 'stdout': u''}\r\n", 
    "msg": "MODULE FAILURE", 
    "rc": 0
}


Please include the entire output from the last TASK line through the end of output if an error is generated

Expected results:

Additional info:
Please attach logs from ansible-playbook with the -vvv flag