Update zmon-agent to 0.4-17-g238126c-zv5
Update zmon-agent to 0.4-17-g238126c-zv5

The latest version of zmon-agent created_by and other fields to postgresqls

/cc @avaczi
zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws,zalando-incubator/kubernetes-on-aws