aiidateam / aiida_core / 6078

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develop: 74%

Pull #2820

travis-ci

Automate export file migration for `verdi import`

Fixes #2739.

Invoke `verdi export migrate` in `verdi import`
if it turns out the export file archive cannot be imported
due to an IncompatibleArchiveVersionError.

The default is to automatically migrate it (via a temporary file).

Introduce the `--non-interactive` flag for `verdi import`.

Add tests for new functionality.

Make sure `--non-interactive` does not print confirm messages.
Make sure old export files are automatically migrated, both local files and from URLs.

Introduce the `--migration`/`--no-migration` choice to force migration, if needed
or avoid automatic migration.
This makes sure that an error code != 0 is still present,
when automatic migration is not performed on old export files.

Following behaviour is expected and implemented:

| `migration` | `non_interactive` | Result CLI | Result script |
| ------------- | ---------------------- | ------------- | ---------------- |
| `True`* | `False`* | Query user, migrate | Migrate |
| `True`* | `True` | No query, migrate | Migrate |
| `False` | `False`* | No query, no migrate | No migrate |
| `False` | `True` | No query, no migrate | No migrate |

*Default.

Separate code into two utility functions that help to import and migrate.

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