Merge pull request #60664 from jiayingz/dp_serial

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Moves the DevicePlugin e2e_node test back to Serial

I forgot the fact that the DevicePlugin test itself restarts Kubelet
for testing purpose. Move that test back to Serial but constructs
a smaller test without kubelet restart that we may run during presubmit.



**What this PR does / why we need it**:

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes https://github.com/kubernetes/kubernetes/issues/60604

**Special notes for your reviewer**:

**Release note**:

```release-note

```
This commit is contained in:
Kubernetes Submit Queue 2018-03-01 17:14:56 -08:00 committed by GitHub
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@ -44,7 +44,7 @@ const (
)
// Serial because the test restarts Kubelet
var _ = framework.KubeDescribe("Device Plugin [Feature:DevicePlugin]", func() {
var _ = framework.KubeDescribe("Device Plugin [Feature:DevicePlugin] [Serial]", func() {
f := framework.NewDefaultFramework("device-plugin-errors")
Context("DevicePlugin", func() {