Add a migration for transition from basic to advanced modular support
CLOSED - CURRENTRELEASE
The migration will be responsible to:
- go through yum_repo_metadata collection
- identify which of those files are modules yaml doc files
- parse with the help of libmodulemd the files, identify modules,
- save modules into the DB,
- associate modules to respective repos.
- unassociate respective yum_repo_metadata units
- add a suggestion message to the migration to encourage to republish repos in which module metadata was identified.