Comment out calls to httptest.Server.Close() to work around

https://github.com/golang/go/issues/12262 . See #19254 for
more details. This change should be reverted when we upgrade
to Go 1.6.

pkg/kubelet/server/server_test.go

@@ -180,6 +180,7 @@ func newServerTest() *serverTestFramework {
 	}
 	server := NewServer(fw.fakeKubelet, fw.fakeAuth, true)
 	fw.serverUnderTest = &server
+	// TODO: Close() this when fix #19254
 	fw.testHTTPServer = httptest.NewServer(fw.serverUnderTest)
 	return fw
 }