Description of problem:
Trying to install on OpenStack on machines without floating IPs fails.

Steps to Reproduce:
1. create OpenStack machines without floating IPs
2. setup inventory file
3. run openshift-ansible

Actual results:

> fatal: [vm-10-0-76-105.example.com]: FAILED! => {"changed": false, "module_stderr": "KeyError('ansible_os_family',)\nTraceback (most recent call last):\n  File \"/tmp/ansible_3Qqndl/ansible_module_openshift_facts.py\", line 1300, in <module>\n    main()\n  File \"/tmp/ansible_3Qqndl/ansible_module_openshift_facts.py\", line 1287, in main\n    additive_facts_to_overwrite)\n  File \"/tmp/ansible_3Qqndl/ansible_module_openshift_facts.py\", line 1039, in __init__\n    additive_facts_to_overwrite)\n  File \"/tmp/ansible_3Qqndl/ansible_module_openshift_facts.py\", line 1061, in generate_facts\n    provider_facts = self.init_provider_facts()\n  File \"/tmp/ansible_3Qqndl/ansible_module_openshift_facts.py\", line 1194, in init_provider_facts\n    provider_info.get('metadata')\n  File \"/tmp/ansible_3Qqndl/ansible_module_openshift_facts.py\", line 345, in normalize_provider_facts\n    facts = normalize_openstack_facts(metadata, facts)\n  File \"/tmp/ansible_3Qqndl/ansible_module_openshift_facts.py\", line 310, in normalize_openstack_facts\n    if socket.gethostbyname(metadata['ec2_compat'][h_var]) == metadata['ec2_compat'][ip_var].split(',')[0]:\nAttributeError: 'list' object has no attribute 'split'\n", "module_stdout": "", "msg": "MODULE FAILURE", "rc": 1}


Expected results:
Installation succeed. 

Additional info:

Analysis shows that installer always expects some value for floating IP to run `split` over it but there is no such value for machines without floating IPs.

The reason for lack of floating IP can be that OpenStack is setup with public routed networks to begin with (e.g. provider network). Or user wants to install without direct internet access to nodes.