Add integration test /WIP

composer.json

composer.lock

src/Controller/CreateFileDataAction.php

src/Controller/DeleteFileDatasByPrefix.php

src/DataPersister/FileDataDataPersister.php

src/DataProvider/FileDataDataProvider.php

src/DependencyInjection/Configuration.php

src/DependencyInjection/DbpRelayBlobExtension.php

src/Helper/DenyAccessUnlessCheckSignature.php

src/Resources/config/services.yaml

src/Resources/config/services_test.yaml

src/Service/BlobService.php

tests/CurlGetTest.php

tests/Kernel.php