node: devicemgr: capture latest API changes and upgrade strategy
node: devicemgr: capture latest API changes and upgrade strategy

- Updates to capture latest device API changes.
- Capture upgrade and version skew strategy to capture the correct state
  since device plugin graduation to Beta in Kubernetes v1.10.

Signed-off-by: Swati Sehgal <391a751e1edbb1bba93d44382a9262f4d9da2c07@redhat.com>

kubernetes/enhancements,kubernetes/enhancements,kubernetes/enhancements