Add make imports check to pull requests

Makefile

@@ -135,7 +135,7 @@ vet: ## Run go vet against code.
 	go vet ./...
 
 .PHONY: test
-test: manifests generate fmt vet envtest ## Run tests. We need LOCALBIN=$(LOCALBIN) to get correct default-config path
+test: manifests generate imports fmt vet envtest ## Run tests. We need LOCALBIN=$(LOCALBIN) to get correct default-config path
 	mkdir -p $(LOCALBIN)/default-config && cp config/manager/$(CONF_DIR)/* $(LOCALBIN)/default-config
 	LOCALBIN=$(LOCALBIN) KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test $(PKGS) -coverprofile cover.out