Specific changes include:
- Add 'user_id' column to 'instance_mappings' table (062)
- Add index covering 'user_id' and 'project_id' columns to
'instance_mappings' table (062)
Note that we forgot to add placeholder migrations in Rocky, meaning
there is significantly less to clean up here.
Change-Id: I38a6f4d1c3d2a9797ba543694401b7b821a79805
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>