recovery from lost contiv-etcd

[LipingMao]

Hi Team,

When I do DR test for contiv-vpp etcd, I find if I delete contiv-etcd-0 pod, the data can be regenerated, but the POD-CIDR maybe mis-match with existed POD-CIDR. In this case, I can recovery the pods network by delete them.

Is it possible for VPP to recovery with the original POD-CIDR?

[rastislavs]

Duplicate of #1492