cleanup all /tmp/kubelet_test files

Signed-off-by: Jess Frazelle <acidburn@google.com>

pkg/kubelet/kubelet_resources_test.go

@@ -33,6 +33,7 @@ func TestPodResourceLimitsDefaulting(t *testing.T) {
 	cpuCores := resource.MustParse("10")
 	memoryCapacity := resource.MustParse("10Gi")
 	tk := newTestKubelet(t, true)
+	defer tk.Cleanup()
 	tk.fakeCadvisor.On("VersionInfo").Return(&cadvisorapi.VersionInfo{}, nil)
 	tk.fakeCadvisor.On("MachineInfo").Return(&cadvisorapi.MachineInfo{
 		NumCores:       int(cpuCores.Value()),