docker-py: don't build --quiet is TESTDEBUG is set

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit ba8f4c7994668992c27619d63e7056770ffb08ad)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

hack/make/test-docker-py

@@ -36,7 +36,8 @@ source hack/make/.integration-test-helpers
 		echo INFO: Building ${docker_py_image}...
 		(
 			[ -n "${TESTDEBUG}" ] && set -x
-			exec docker build --quiet -t ${docker_py_image} -f tests/Dockerfile "https://github.com/docker/docker-py.git#${DOCKER_PY_COMMIT}"
+			[ -z "${TESTDEBUG}" ] && build_opts="--quiet"
+			exec docker build ${build_opts} -t ${docker_py_image} -f tests/Dockerfile "https://github.com/docker/docker-py.git#${DOCKER_PY_COMMIT}"
 		)
 	fi