fix logstash grok/geoip to observe on openbazaar network hello map

the openbazaar network map about [OpenBazaar/connection.py hello message](https://github.com/OpenBazaar/OpenBazaar/blob/master/node/connection.py#L136)

![ob-geoip-logstash](https://cloud.githubusercontent.com/assets/1840874/4216758/a0af7b28-38de-11e4-941c-ed4339a8552b.jpg)


How to launch openbazaar+elk

```
$ git clone https://github.com/OpenBazaar/OpenBazaar && cd OpenBazaar
$ cd test/docker/logelk
$ bash build.sh -a
$ sudo fig up -d
$ sudo fig logs
```

OpenBazaar http://DOCKER_HOST:8888/

Kibana http://DOCKER_HOST:9280/