Move omniauth-related AccountController specs to separate file
Omniauth: Check auth_hash validity via valid? instead of manual check
Omniauth: Add spec testing redirect on disabled self registration
Omniauth spec: Check more user fields for being assigned
Omniauth: Return 400 on invalid auth_hash
honor timestamp in auth_hash
Merge remote-tracking branch 'origin/feature/omniauth' into feature/omniauth-openid-connect