* stable-3.0:
Update git submodules
Upgrade testcontainers to 1.12.0
Set version to 2.15.16-SNAPSHOT
Fix ls-user-ref and use the correct identity for listing refs
Set version to 2.15.15
ReceiveCommits: Fix comparison to ensure correct log message
NotifyResolver: Remove todo that is already addressed
Set sshd.threads to at least 4.
Add assertThrows method compatible with future JUnit 4.13
ReceiveCommits: Bypass commit count when skip-validation is used
Update git submodules
Introduce repository size quota enforcer
Extend QuotaBackend and QuotaEnforcer extension point
Update git submodules
Update git submodules
Update git submodules
Update git submodules
Redirect /groups/self to /settings/#Groups
Add support for /groups
Update git submodules
Update git submodules
Update git submodules
Update git submodules
Update git submodules
Update git submodules
Update git submodules
AccountCacheImpl: Don't return null on error but Optional.empty()
change-merged: set correct newRev on submit by push
Change-Id: I63059ad2e80bf10f972afe3b5c80aa323fb663ee
a26387368e