Allow setting short value in integration tests

hack/make-rules/test-integration.sh

@@ -63,7 +63,7 @@ runTests() {
   # KUBE_RACE="-race"
   make -C "${KUBE_ROOT}" test \
       WHAT="$(kube::test::find_integration_test_dirs ${2-} | paste -sd' ' -) $(echo ${@:3})" \
-      KUBE_GOFLAGS="${KUBE_GOFLAGS:-} -short=true -tags 'integration no-docker'" \
+      KUBE_GOFLAGS="${KUBE_GOFLAGS:-} ${SHORT:--short=true} -tags 'integration no-docker'" \
       KUBE_TEST_ARGS="${KUBE_TEST_ARGS:-} --vmodule=garbage*collector*=6 --alsologtostderr=true" \
       KUBE_RACE="" \
       KUBE_TIMEOUT="${KUBE_TIMEOUT}" \