Adding more DB groups to test suits

...v/tests/unit/connector/sabre/requesttest/downloadtest.php

...unit/connector/sabre/requesttest/encryptionuploadtest.php

...dav/tests/unit/connector/sabre/requesttest/uploadtest.php

apps/files_sharing/tests/controller/sharecontroller.php

apps/files_sharing/tests/externalstorage.php

apps/files_trashbin/tests/command/cleanuptest.php

apps/files_trashbin/tests/storage.php

apps/files_trashbin/tests/trashbin.php

apps/files_versions/tests/versions.php

apps/provisioning_api/tests/appstest.php

apps/provisioning_api/tests/testcase.php

tests/core/avatar/avatarcontrollertest.php

tests/lib/encryption/decryptalltest.php

tests/lib/files/cache/wrapper/cachejail.php

tests/lib/files/cache/wrapper/cachepermissionsmask.php

tests/lib/files/node/folder.php

tests/lib/files/node/hookconnector.php

tests/lib/files/storage/commontest.php

tests/lib/files/storage/copydirectory.php

tests/lib/files/storage/home.php