Fix hostname default when valid hostname not found on system

roles/openshift_facts/library/openshift_facts.py

@@ -683,7 +683,7 @@ class OpenShiftFacts(object):
         hostname_f = output.strip() if exit_code == 0 else ''
         hostname_values = [hostname_f, self.system_facts['nodename'],
                            self.system_facts['fqdn']]
-        hostname = choose_hostname(hostname_values)
+        hostname = choose_hostname(hostname_values, ip_addr)
 
         common = dict(use_openshift_sdn=True, ip=ip_addr, public_ip=ip_addr,
                       deployment_type='origin', hostname=hostname,