Fix usage of deprecated private constants

apps/files/appinfo/routes.php

apps/files_external/appinfo/routes.php

apps/files_sharing/appinfo/routes.php

apps/files_trashbin/appinfo/routes.php

apps/files_versions/appinfo/routes.php

apps/provisioning_api/appinfo/routes.php

apps/provisioning_api/lib/apps.php

apps/provisioning_api/lib/groups.php

apps/provisioning_api/lib/users.php

apps/provisioning_api/tests/appstest.php

apps/provisioning_api/tests/groupstest.php

apps/provisioning_api/tests/userstest.php

lib/private/api.php

ocs/routes.php