fixup! Pass playbook_timestamp into Formatters directly, rather than pulling it…

fixup! Pass playbook_timestamp into Formatters directly, rather than pulling it from callback_module

playbooks/callback_plugins/task_timing.py

@@ -218,6 +218,6 @@ class CallbackModule(object):
         )
 
         for fmt_class in self.formatters:
-            formatter = fmt_class(playbook_timestamp)
+            formatter = fmt_class(self.playbook_timestamp)
             formatter.log_tasks(self.playbook_name, results)
             formatter.log_play(self.playbook_name, len(self.stats))