VOL-2395:  Old etcd cache remembers valuesit should not

This causes any outside updates to KV to be missed.
Eliminate the cache.

Also bump protos to match what openonu already uses.
This prevents a "make venv" error, nothing functional is
affected as onu already uses these protos.

Change-Id: Ie7e1e8059de28e540dfeb97228c346cfed7171f8
3 files changed