Migration Plugin

Steps to reproduce:

1. sync down RHEL 8 OS and RHEL 8 appstream to 2 different repos in pulp2 (note, may not need both, may be able to reproduce with some other repo, nots ure)
2. Create two new repos with pulp2 and clone the content from the ones synced down in step 2
3. Delete the cloned content
4. Attempt to do a simple migration:

{
  "plugins": [
    {
      "type": "docker",
      "repositories": []
    },
    {
      "type": "iso",
      "repositories": []
    },
    {
      "type": "rpm",
      "repositories": [
        {
          "name": "0d9b7b71-30b3-49d7-abbb-eade4d2f1cb4",
          "repository_versions": [
            {
              "pulp2_repository_id": "0d9b7b71-30b3-49d7-abbb-eade4d2f1cb4",
              "pulp2_distributor_repository_ids": [
                "0d9b7b71-30b3-49d7-abbb-eade4d2f1cb4"
              ]
            }
          ],
          "pulp2_importer_repository_id": "0d9b7b71-30b3-49d7-abbb-eade4d2f1cb4"
        },
        {
          "name": "69ff76ed-208d-4261-9223-7a456b88ac84",
          "repository_versions": [
            {
              "pulp2_repository_id": "69ff76ed-208d-4261-9223-7a456b88ac84",
              "pulp2_distributor_repository_ids": [
                "69ff76ed-208d-4261-9223-7a456b88ac84"
              ]
            }
          ],
          "pulp2_importer_repository_id": "69ff76ed-208d-4261-9223-7a456b88ac84"
        }
      ]
    }
  ]
}

results:

pulp: rq.worker:ERROR: pulp_2to3_migration.app.models.repository.Pulp2Repository.DoesNotExist: Pulp2Repository matching query does not exist.
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/rq/worker.py", line 883, in perform_job
rv = job.perform()
File "/usr/local/lib/python3.6/site-packages/rq/job.py", line 645, in perform
self._result = self._execute()
File "/usr/local/lib/python3.6/site-packages/rq/job.py", line 651, in _execute
return self.func(*self.args, **self.kwargs)
File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/tasks/migrate.py", line 127, in migrate_from_pulp2
migrate_content(plan)
File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/migration.py", line 34, in migrate_content
plugin.migrator.migrate_content_to_pulp3()
File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/plugin/rpm/migrator.py", line 148, in migrate_content_to_pulp3
loop.run_until_complete(dm.create())
File "/usr/lib64/python3.6/asyncio/base_events.py", line 484, in run_until_complete
return future.result()
File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/plugin/content.py", line 84, in create
await pipeline
File "/usr/local/lib/python3.6/site-packages/pulpcore/plugin/stages/api.py", line 225, in create_pipeline
await asyncio.gather(*futures)
File "/usr/local/lib/python3.6/site-packages/pulpcore/plugin/stages/api.py", line 43, in __call__
await self.run()
File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/plugin/rpm/migrator.py", line 203, in run
thru = self.relate_packages_to_group(dc)
File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/plugin/rpm/migrator.py", line 286, in relate_packages_to_group
not_in_plan=False)
File "/usr/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/usr/lib/python3.6/site-packages/django/db/models/query.py", line 408, in get
self.model._meta.object_name
pulp_2to3_migration.app.models.repository.Pulp2Repository.DoesNotExist: Pulp2Repository matching query does not exist.
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/rq/worker.py", line 883, in perform_job
rv = job.perform()
File "/usr/local/lib/python3.6/site-packages/rq/job.py", line 645, in perform
self._result = self._execute()
File "/usr/local/lib/python3.6/site-packages/rq/job.py", line 651, in _execute
return self.func(*self.args, **self.kwargs)
 File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/tasks/migrate.py", line 127, in migrate_from_pulp2
 migrate_content(plan)
 File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/migration.py", line 34, in migrate_content
 plugin.migrator.migrate_content_to_pulp3()
 File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/plugin/rpm/migrator.py", line 148, in migrate_content_to_pulp3
 loop.run_until_complete(dm.create())
 File "/usr/lib64/python3.6/asyncio/base_events.py", line 484, in run_until_complete
 return future.result()
 File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/plugin/content.py", line 84, in create
 await pipeline
 File "/usr/local/lib/python3.6/site-packages/pulpcore/plugin/stages/api.py", line 225, in create_pipeline
 await asyncio.gather(*futures)
 File "/usr/local/lib/python3.6/site-packages/pulpcore/plugin/stages/api.py", line 43, in __call__
 await self.run()
 File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/plugin/rpm/migrator.py", line 203, in run
 thru = self.relate_packages_to_group(dc)
 File "/usr/local/lib/python3.6/site-packages/pulp_2to3_migration/app/plugin/rpm/migrator.py", line 286, in relate_packages_to_group
 not_in_plan=False)
 File "/usr/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
 return getattr(self.get_queryset(), name)(*args, **kwargs)
 File "/usr/lib/python3.6/site-packages/django/db/models/query.py", line 408, in get
 self.model._meta.object_name
 pulp_2to3_migration.app.models.repository.Pulp2Repository.DoesNotExist: Pulp2Repository matching query does not exist.