the getBackend function in the storage_api_handler was returning the wrong error message and the controller was expecting the right one, so i fixed it to return the correct error.
Coverage remained the same at 51.98% when pulling 6c68795ac06cdb3b1fa3747c700a4a8fe150f3fa on fix/UB-1436_umount_when_pv_does_not_exist into ce75e335a99b1330b124568ae8bed105b58452ca on dev.
the getBackend function in the storage_api_handler was returning the wrong error message and the controller was expecting the right one, so i fixed it to return the correct error.
This change is