feat(obligation_import): Add functionality to import obligations via …

[deo002]

Add functionality to import obligations via a json file
JSON file format example:

[
    {
        "topic": "Provide Copyright Notices",
        "type": "obligation",
        "text": "Text 2",
        "classification": "green",
        "modifications": true,
        "comment": "",
        "shortnames": ["LGPL-3.0-or-later","QPL-1.0","GPL-1.0-only","GPL-1.0-or-later"],
        "active": true,
        "text_updatable": true
    },
    {
        "topic": "provide license upstream",
        "type": "obligation",
        "text": "Text",
        "modifications": false,
        "comment": "",
        "shortnames": ["LGPL-2.1-only"],
        "active": true,
        "text_updatable": true
    }
]

[GMishx]

The import works partially. I tried to import 3 obligations.

1. Changed the obligation comment -> worked
2. Changed the obligation topic but not text -> failed as expected
3. New obligation with new text -> Obligation is created with the correct topic but rest fields contains default values.

I guess, the FirstOrCreate() only created the obligation with given condition in Where(). Since the Updates() was not called afterwards, the values were not updated (other than topic).

[GMishx]

Changes looks good.
Tested, working as expected.