Use Ubuntu 14.04 instead of pinning to 14.04.1
Use Ubuntu 14.04 instead of pinning to 14.04.1

This way we always have the latest and greatest Ubuntu 14.04 LTS

kakiezhang/docker-grafana-graphite,ImmobilienScout24/docker-grafana-graphite,iheartradio/docker-grafana-graphite,Andro999b/graphite-grafana,abarbanell/docker-grafana-graphite,dokku/docker-grafana-graphite,jarek-przygodzki/docker-grafana-graphite,ImmobilienScout24/docker-grafana-graphite,jarek-przygodzki/docker-grafana-graphite,pastcompute/docker-grafana-graphite,jhu-chang/docker-grafana-graphite,iheartradio/docker-grafana-graphite,jhu-chang/docker-grafana-graphite,kakiezhang/docker-grafana-graphite,pastcompute/docker-grafana-graphite,kakiezhang/docker-grafana-graphite,abarbanell/docker-grafana-graphite,abarbanell/docker-grafana-graphite,Andro999b/graphite-grafana,iheartradio/docker-grafana-graphite,ImmobilienScout24/docker-grafana-graphite,kamon-io/docker-grafana-graphite,dokku/docker-grafana-graphite,pastcompute/docker-grafana-graphite,jhu-chang/docker-grafana-graphite,dokku/docker-grafana-graphite,kamon-io/docker-grafana-graphite,Andro999b/graphite-grafana,jarek-przygodzki/docker-grafana-graphite,kamon-io/docker-grafana-graphite