bug 1042122 - fix b2g_bumper for merge day. r=callek
bug 1042122 - fix b2g_bumper for merge day. r=callek

simar7/build-mozharness,simar7/build-mozharness,kartikgupta0909/build-mozharness,kartikgupta0909/build-mozharness,armenzg/build-mozharness,lissyx/build-mozharness,kartikgupta0909/mozilla-mozharness,kartikgupta0909/gittest,walac/build-mozharness,mrrrgn/build-mozharness,walac/build-mozharness,kartikgupta0909/gittest,mozilla/build-mozharness,mozilla/build-mozharness,armenzg/build-mozharness,kartikgupta0909/mozilla-mozharness,mrrrgn/build-mozharness,lissyx/build-mozharness