* stable-2.16:
FakeGroupAuditService: Make auditEvents final
ErrorProne: Increase severity of MutableConstantField to ERROR
ConfigUpdatedEvent: Use immutable type in field declaration
Add missing slf4j dependencies in BUILD file
JGitMetricModule: fix WindowCache miss ration which wasn't reported
Revert "JGitMetricModule: Replace anonymous Supplier instances with method references"
Suppress generic logging on docker start for ElasticSearch container
Replace deprecated OptionParser with ArgumentParser
Change-Id: I36a7ce5c043bd43d90fb415fcec67440db2b5c84