Pin autograph to 2.2.0 temporarily.
Pin autograph to 2.2.0 temporarily.

This works around startup problems raised by https://github.com/mozilla-services/autograph/commit/a72245d8b8c5e7b0d6c4437d246bd153ca2a7c76

wagnerand/olympia,kumar303/addons-server,wagnerand/addons-server,kumar303/addons-server,diox/olympia,bqbn/addons-server,diox/olympia,eviljeff/olympia,aviarypl/mozilla-l10n-addons-server,eviljeff/olympia,mozilla/olympia,eviljeff/olympia,atiqueahmedziad/addons-server,bqbn/addons-server,bqbn/addons-server,wagnerand/addons-server,wagnerand/olympia,wagnerand/addons-server,mozilla/olympia,kumar303/olympia,psiinon/addons-server,kumar303/olympia,wagnerand/olympia,mozilla/addons-server,wagnerand/addons-server,atiqueahmedziad/addons-server,mozilla/addons-server,aviarypl/mozilla-l10n-addons-server,mozilla/olympia,bqbn/addons-server,mozilla/olympia,wagnerand/olympia,aviarypl/mozilla-l10n-addons-server,atiqueahmedziad/addons-server,aviarypl/mozilla-l10n-addons-server,mozilla/addons-server,mozilla/addons-server,kumar303/olympia,diox/olympia,psiinon/addons-server,psiinon/addons-server,kumar303/addons-server,diox/olympia,psiinon/addons-server,atiqueahmedziad/addons-server,eviljeff/olympia,kumar303/addons-server,kumar303/olympia