ci/Makefile: Fix syntax error when running locally
The quotation marks make Docker to not take the values we are passing.
CONTAINER_REPO ?= docker.io/kinvolk/gadget
IMAGE_TAG ?= $(shell ./tools/image-tag branch)
-TESTS_DOCKER_ARGS ?= "-e KUBECONFIG=/opt/kubeconfig/config -v $(HOME)/.kube:/opt/kubeconfig"
+TESTS_DOCKER_ARGS ?= -e KUBECONFIG=/opt/kubeconfig/config -v $(HOME)/.kube:/opt/kubeconfig
KUBERNETES_DISTRIBUTION ?= ""
