Revert "Use ExpectEqual test/e2e_node"

This reverts commit 561ee6ece9.

test/e2e_node/e2e_node_suite_test.go

@@ -307,7 +307,7 @@ func getNode(c *clientset.Clientset) (*v1.Node, error) {
 	if nodes == nil {
 		return nil, fmt.Errorf("the node list is nil")
 	}
-	framework.ExpectNotEqual(len(nodes.Items) > 1, true, "the number of nodes is more than 1.")
+	gomega.Expect(len(nodes.Items) > 1).NotTo(gomega.BeTrue(), "the number of nodes is more than 1.")
 	if len(nodes.Items) == 0 {
 		return nil, fmt.Errorf("empty node list: %+v", nodes)
 	}