docker-py: run without tty to disable color output

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

hack/make/test-docker-py

@@ -57,7 +57,7 @@ source hack/make/.integration-test-helpers
 	(
 		[ -n "${TESTDEBUG}" ] && set -x
 		# shellcheck disable=SC2086
-		exec docker run -t --rm ${run_opts} "${docker_py_image}" pytest ${PY_TEST_OPTIONS} tests/integration
+		exec docker run --rm ${run_opts} "${docker_py_image}" pytest ${PY_TEST_OPTIONS} tests/integration
 	)
 	bundle .integration-daemon-stop
 ) 2>&1 | tee -a "$DEST/test.log"