fix golint failures of test/e2e/network

test/e2e/network/framework.go

@@ -18,6 +18,7 @@ package network
 
 import "github.com/onsi/ginkgo"
 
+// SIGDescribe annotates the test with the SIG label.
 func SIGDescribe(text string, body func()) bool {
 	return ginkgo.Describe("[sig-network] "+text, body)
 }