e2e: warn about slow tests only when >= 1 minute

We have several tests that trigger the default threshold.

Author: pohly

test/test.make

@@ -186,6 +186,7 @@ RUN_E2E = KUBECONFIG=`pwd`/_work/$(CLUSTER)/kube.config \
                 -ginkgo.skip='$(subst $(space),|,$(strip $(subst @,$(space),$(TEST_E2E_SKIP_ALL))))' \
                 -ginkgo.focus='$(subst $(space),|,$(strip $(subst @,$(space),$(TEST_E2E_FOCUS))))' \
 		-ginkgo.randomizeAllSpecs=false \
+		-ginkgo.slow-spec-threshold=1m \
 		-ginkgo.timeout=$(TEST_E2E_TIMEOUT) \
 	        $(TEST_E2E_ARGS) \
                 -report-dir=$(TEST_E2E_REPORT_DIR)