Add reporter to report logs sent by foreman callback

When ansible fails to connect to remote host,
callback sends a report to Foreman without
any indication that the report comes from
Ansible. As a result, Foreman is unable
to determine the report origin.

This adds a 'reporter' attribute into
the logs that are sent.

plugins/callback/foreman.py

@@ -179,7 +179,8 @@ def _build_log(self, data):
                     'messages': {
                         'message': json.dumps(msg)
                     },
-                    'level': level
+                    'level': level,
+                    'reporter': 'ansible'
                 }
             })
         return logs