This will be necessary when adding gitaly settings. This version
doesn't make any functional changes, but allows us to include this
breaking change in 9.0 and add the needed extra settings in the future
with backwards compatibility

Speed up MergeRequest::RefreshService spec by combining examples

See merge request !1386

Fix edit last visual token

See merge request !1383

Fix filtered search visual token editing dropdown

See merge request !1384

Add a GitLab Geo download scheduler for LFS files

See merge request !1382

Add filtered search visual tokens (ee)

See merge request !1378

The download scheduler works as follows:

1. Load a batch of IDs that we need to download from the primary (DB_RETRIEVE_BATCH) into a pending list.
2. Schedule them so that at most MAX_CONCURRENT_DOWNLOADS are running at once.
3. When a slot frees, schedule another download.
4. When we have drained the pending list, load another batch into memory, and schedule the remaining files, excluding ones in progress.
5. Quit when we have scheduled all downloads or exceeded an hour.

Basic support to track the backfilling of repositories

See merge request !1197

Export issues to CSV

Closes #1480

See merge request !1126

This will add a lot of overhead to running specs locally without
Spring. If specs failing locally the person should run `bin/rake
geo:db:test:prepare`.