logdetail callback plugin ported to ansible-2.0 and modify old logdetail plugin so it won't run automatically in 2.0

callback_plugins/logdetail.py

@@ -162,6 +162,11 @@ class CallbackModule(CallbackBase):
     """
     logs playbook results, per host, in /var/log/ansible/hosts
     """
+    CALLBACK_NAME = 'logdetail'
+    CALLBACK_TYPE = 'notification'
+    CALLBACK_VERSION = 2.0
+    CALLBACK_NEEDS_WHITELIST = True
+
     def __init__(self):
         self._task_count = 0
         self._play_count = 0