* stable-2.15:
Extract an enum for label functions
LabelNormalizer: Remove unused fields and exceptions
MoveChange: only keep veto votes
SubmitRules: discontinue permission checks
LabelNormalizer: stop squashing based on permitted range
Trim multi-line arguments for task name and ssh_log
PostReview: Remove support for 'strictLabels' option
Revert "SSH commands: Set task name for ReviewCommand"
Improve naming of group caches
Cache groups by member outside of the account cache
Remove the dependency of the account cache on the group index
Change-Id: I2fb446d4b2137b5f1a78748dec3cfb96a1063c68
d173fcfc78