fix plural strings a little bit
fix default priority
bug 793022 - roll out mozharness desktop unittests. r=catlee,rail
[Bug 841468] add panda-0033 and panda-0045 to devices.json and use them as b2g devices r=armenzg
bug 793022 - turn off b2g test symbol fetching. r=rail
Bug 837268 - Enable Ubuntu tests slaves on cedar b2g. r=catlee
back out 76d828a9bb4a due to 20.0b1 bustage.
Merge branch 'master' of https://github.com/mozilla/build-buildbot-configs into branch_priorities
move default priority out into a variable to make it more clear