Description of problem:
Installation failed on GCE with cloudprovider enabled

Version-Release number of selected component (if applicable):
openshift-ansible-3.5.2-1

How reproducible:
Always

Steps to Reproduce:
1.install OpenShift v3.5 cluster on GCE with cloudprovider enabled

Actual results:
Failed.
TASK [openshift_cloud_provider : Set cloud provider facts] *********************
Thursday 26 January 2017  04:17:27 +0000 (0:00:00.689)       0:04:11.398 ****** 

An exception occurred during task execution. To see the full traceback, use -vvv. The error was: KeyError: 'hostname'
fatal: [qe-wmeng353-oa351master-nfs-1.0126-to7.qe.rhcloud.com]: FAILED! => {"changed": false, "failed": true, "module_stderr": "Traceback (most recent call last):\n  File \"/tmp/ansible_1znXpn/ansible_module_openshift_facts.py\", line 2476, in <module>\n    main()\n  File \"/tmp/ansible_1znXpn/ansible_module_openshift_facts.py\", line 2463, in main\n    protected_facts_to_overwrite)\n  File \"/tmp/ansible_1znXpn/ansible_module_openshift_facts.py\", line 1920, in __init__\n    protected_facts_to_overwrite)\n  File \"/tmp/ansible_1znXpn/ansible_module_openshift_facts.py\", line 1990, in generate_facts\n    facts = set_nodename(facts)\n  File \"/tmp/ansible_1znXpn/ansible_module_openshift_facts.py\", line 1036, in set_nodename\n    facts['node']['nodename'] = '.'.split(facts['provider']['metadata']['hostname'])[0]\nKeyError: 'hostname'\n", "module_stdout": "", "msg": "MODULE FAILURE"}

Expected results:
Install success

Additional info:
likely caused by this:
https://github.com/openshift/openshift-ansible/commit/151e25cc0ff12dd046efcdd61fa5a1ad21a96ac5#diff-8c83287a125220bc46f58c79f26c6670