Perhaps it's not metadata agent, because reconfiguration does not help:
It still tries to connect to localhost:


2014-07-30 11:53:28.460 14327 ERROR neutron.notifiers.nova [req-9e511e04-6a3a-45f1-afe0-ee1b3d365fca None] Failed to notify nova on events: [{'status': 'completed', 'tag': u'358b4880-be54-44a2-a3e0-227b6ea8fadd', 'name': 'network-vif-unplugged', 'server_uuid': u'f861a43f-1df1-435b-a71f-05b65d627c4d'}]
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova Traceback (most recent call last):
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/neutron/notifiers/nova.py", line 221, in send_events
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     batched_events)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/novaclient/v1_1/contrib/server_external_events.py", line 39, in create
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     return_raw=True)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/novaclient/base.py", line 152, in _create
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     _resp, body = self.api.client.post(url, body=body)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 286, in post
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     return self._cs_request(url, 'POST', **kwargs)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 269, in _cs_request
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     self.authenticate()
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 382, in authenticate
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     auth_url = self._v2_auth(auth_url)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 469, in _v2_auth
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     return self._authenticate(url, body)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 482, in _authenticate
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     **kwargs)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 242, in _time_request
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     resp, body = self.request(url, method, **kwargs)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/novaclient/client.py", line 213, in request
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     **kwargs)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 383, in request
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     resp = self.send(prep, **send_kwargs)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 486, in send
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     r = adapter.send(request, **kwargs)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova   File "/usr/lib/python2.7/dist-packages/requests/adapters.py", line 378, in send
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova     raise ConnectionError(e)
2014-07-30 11:53:28.460 14327 TRACE neutron.notifiers.nova ConnectionError: HTTPConnectionPool(host='localhost', port=5000): Max retries exceeded with url: /v2.0/tokens (Caused by <class 'socket.error'>: [Errno 111] ECONNREFUSED)