update the requirement.txt to ansible 2.x

playbooks/callback_plugins/datadog_tasks_timing.py

@@ -38,10 +38,10 @@ class CallbackModule(object):
     def clean_tag_value(self, value):
         return value.replace(" | ", ".").replace(" ", "-").lower()
 
-    def playbook_on_play_start(self, pattern):
-            self.playbook_name, _ = os.path.splitext(
-                os.path.basename(self.play.playbook.filename)
-            )
+    # def playbook_on_play_start(self, pattern):
+    #         self.playbook_name, _ = os.path.splitext(
+    #             os.path.basename(self.play.playbook.filename)
+    #         )
 
     def playbook_on_task_start(self, name, is_conditional):
         """