Description of problem:

There is a correctness problem when distributors are reused between two different migration plans.

Create plan and run:


{
    "plan": {
        "plugins": [
            {
                "repositories": [
                    {
                        "name": "file",
                        "pulp2_importer_repository_id": "file",
                        "repository_versions": [
                            {
                                "pulp2_distributor_repository_ids": [
                                    "file2"
                                ],
                                "pulp2_repository_id": "file"
                            }
                        ]
                    },
                    {
                        "name": "file2",
                        "pulp2_importer_repository_id": "file2",
                        "repository_versions": [
                            {
                                "pulp2_distributor_repository_ids": [
                                    "file-many"
                                ],
                                "pulp2_repository_id": "file2"
                            }
                        ]
                    }
                ],
                "type": "iso"
            }
        ]
    },

Create another plan and run:

{
    "plan": {
        "plugins": [
            {
                "repositories": [
                    {
                        "name": "file",
                        "pulp2_importer_repository_id": "file",
                        "repository_versions": [
                            {
                                "pulp2_distributor_repository_ids": [
                                    "file-many"
                                ],
                                "pulp2_repository_id": "file"
                            }
                        ]
                    },
                    {
                        "name": "file2",
                        "pulp2_importer_repository_id": "file2",
                        "repository_versions": [
                            {
                                "pulp2_distributor_repository_ids": [
                                    "file-large"
                                ],
                                "pulp2_repository_id": "file2"
                            }
                        ]
                    }
                ],
                "type": "iso"
            }
        ]
    },
File2 repo will have 2 distributions displayed file-large and file-many. In addition there is a concern of hitting base_path collision because same distributor file-many has been used to distribute 2 different repos.

NOTE: Importers will suffer as well from correctness problem in case same importer will be used for 2 different repos in between the migration plans


### Another way to grasp the problem

Imagine when two distributors are being swapped.

First migration plan/run:
repo A with dist A
repo B with dist B

Second migration plan/run:
repo A with dist B
repo B with dist A