use value of RELEASE environment variable if already set
use value of RELEASE environment variable if already set

kensipe/mesos-storm,erikdw/storm-mesos,salimane/storm,echinthaka/storm,bixiyan/storm,bixiyan/storm,echinthaka/storm,mesos/storm,salimane/storm,groupon/mesos-storm,groupon/mesos-storm,mesos/storm,drewrobb/mesos-storm,erikdw/storm-mesos,drewrobb/mesos-storm,DarinJ/storm,groupon/mesos-storm,changreytang/storm-mesos,erikdw/storm-mesos,drewrobb/mesos-storm,bixiyan/storm,kensipe/mesos-storm,groupon/mesos-storm,mesos/storm,DarinJ/storm,changreytang/storm-mesos,kensipe/mesos-storm,echinthaka/storm,salimane/storm,DarinJ/storm,kensipe/mesos-storm,changreytang/storm-mesos,bixiyan/storm,echinthaka/storm,drewrobb/mesos-storm