Fix tripleo_profile_tasks callback plugin _output()

Regression from https://review.opendev.org/#/c/733394/

Change-Id: Ied39aaef9c65c65f33cceb99071c53af7f9aa464

tripleo_ansible/ansible_plugins/callback/tripleo_profile_tasks.py

@@ -49,13 +49,13 @@ class CallbackModule(PT):
         self.start_time = time.time()
         super(CallbackModule, self).__init__()
 
-    def _output(self, msg, color):
+    def _output(self, msg, color=None):
         timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f")
         if isinstance(msg, list):
             output = ' | '.join([timestamp] + msg)
         else:
             output = timestamp + ' | ' + msg
-        self._output(output, color=color)
+        self._display.display(output, color=color)
 
     def _output_previous_timings(self, uuid):
         # no previous timing because uuid was null