No longer a global env_name variable
No longer a global env_name variable

Reference buildbot_net.env_name instead of just env_name.

ewongbb/buildbot-infra,ewongbb/buildbot-infra,seankelly/buildbot-infra,buildbot/buildbot-infra,djmitche/buildbot-infra,buildbot/buildbot-infra,seankelly/buildbot-infra,buildbot/buildbot-infra,djmitche/buildbot-infra,seankelly/buildbot-infra,djmitche/buildbot-infra