Merge branch 'stable-3.7' into stable-3.8
* stable-3.7:
Rename metric tasks/max_retries to tasks/failed_max_retries
Document metrics
Fix completed tasks metrics
Log fetch tasks when graceful shutdown fails
Displaying refs for fetch tasks
Leverage ShutdownState in SourcesCollection
Fix pull replication queue metric prefix
Set pull replication tests as large
Introduce replication queue metrics
Handle fetch tasks gracefully during shutdown
Add integration test for new project creation
Do not honor gerrit.replicateOnStartup on primary side
Change-Id: Ib05b146593f47b38ccc49e933287dfa907043b31
