Cleanup e2e_node test style

Remove the use of  Except(err).NotTo(HaveOccured()), and switch to using
framework ramework.ExpectNoError(err)

test/e2e_node/runtime_conformance_test.go

@@ -31,7 +31,6 @@ import (
 	"k8s.io/kubernetes/test/e2e_node/services"
 
 	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
 )
 
 var _ = framework.KubeDescribe("Container Runtime Conformance Test", func() {
@@ -84,7 +83,7 @@ var _ = framework.KubeDescribe("Container Runtime Conformance Test", func() {
 
 					configFile := filepath.Join(services.KubeletRootDirectory, "config.json")
 					err := ioutil.WriteFile(configFile, []byte(auth), 0644)
-					Expect(err).NotTo(HaveOccurred())
+					framework.ExpectNoError(err)
 					defer os.Remove(configFile)
 
 					// checkContainerStatus checks whether the container status matches expectation.