Automatic merge from submit-queue (batch tested with PRs 56480, 56675, 56624, 56648, 56658). 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>.
Fix session out in vSphere Cloud Provider
**What this PR does / why we need it**:
When the disk is attached error is returned in case of VM migration but the disk is attached successfully. When pvc is created for provisioning volume dynamically the volume is not provisioned since the vc session was expired and not renewed. This PR fixes both the issues.
**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/vmware/kubernetes/issues/393https://github.com/vmware/kubernetes/issues/391
**Special notes for your reviewer**:
Internally review PR here: https://github.com/vmware/kubernetes/pull/396
**Release note**:
```release-note
NONE
```
Test Done:
Test for fix https://github.com/vmware/kubernetes/issues/391 (Prints error on attach disk)
- Create storageclass and pvc to provision volume dynamically.
- Migrated VM to different VC.
- Created Pod with volume provisioned at step 1.
- Executed command kubectl describe pod.
After Fix: Didn't find the error message.
Test for fix https://github.com/vmware/kubernetes/pull/396 (Session out)
Tests which reported this issue: go run hack/e2e.go --check-version-skew=false --v --test '--test_args=--ginkgo.focus=Selector-Label\sVolume\sBinding:vsphere'
After Fix: This tests didn't report any errors.
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