Automatic merge from submit-queue (batch tested with PRs 56639, 56746, 56715, 56673, 56726). 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 issue #390
**What this PR does / why we need it**:
When VM node is removed from vSphere Inventory, the corresponding Kubernetes node is unregistered and removed from registeredNodes cache in nodemanager. However, it is not removed from the other node info cache in nodemanager. The fix is to update the other cache accordingly.
**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/390
**Special notes for your reviewer**:
Internally review PR here: https://github.com/vmware/kubernetes/pull/402
**Release note**:
```
NONE
```
Testing Done:
1. Removed the node VM from vSphere inventory.
2. Create storageclass and pvc to provision volume dynamically
- vsphere.conf (cloud-config) is now needed only on master node
- VCP uses OS hostname and not vSphere inventory name
- VCP is now resilient to VM inventory name change and VM migration
