Fix Quick Installer failed due to a Python method failure

Fixes issues dumping various objects to YAML. This change updates the
quick installer fact caching callback to use the improved
AnsibleDumper when writing out the facts to storage.

* https://bugzilla.redhat.com/show_bug.cgi?id=1421053
* https://bugzilla.redhat.com/show_bug.cgi?id=1421061
* https://bugzilla.redhat.com/show_bug.cgi?id=1421059

utils/src/ooinstall/ansible_plugins/facts_callback.py

@@ -5,6 +5,7 @@
 import os
 import yaml
 from ansible.plugins.callback import CallbackBase
+from ansible.parsing.yaml.dumper import AnsibleDumper
 
 
 # pylint: disable=super-init-not-called
@@ -38,7 +39,11 @@ class CallbackModule(CallbackBase):
             facts = abridged_result['result']['ansible_facts']['openshift']
             hosts_yaml = {}
             hosts_yaml[res._host.get_name()] = facts
-            os.write(self.hosts_yaml, yaml.safe_dump(hosts_yaml))
+            to_dump = yaml.dump(hosts_yaml,
+                                allow_unicode=True,
+                                default_flow_style=False,
+                                Dumper=AnsibleDumper)
+            os.write(self.hosts_yaml, to_dump)
 
     def v2_runner_on_skipped(self, res):
         pass