Unit tests

[monster3d]

Adds new unit tests

• Entities/WebHookInfo
• Entities/Lacation
• Entities/File

[MBoretto]

I was obliged to remove 3 test because of some incompatibilities with the new Entities structure.
Feel free to reiplement them on top of the new develop.

tests/unit/Entities/FileTest.php
testCreateInstanceWithoutFileId()

tests/unit/Entities/LocationTest.php
testCreateInstanceWithoutLatitude()
testCreateInstanceWithoutLongitude()

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