Bug 989533 - Pass --e10s option down to testrunner (r=aki)
Bug 989533 - Pass --e10s option down to testrunner (r=aki)

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