monv2: rename val.Add to val.Observe
monv2: rename val.Add to val.Observe

Change-Id: I87ac4bd99f198ce309d8cefef0acf6d5bec1a90f
Reviewed-on: https://gerrit.spacemonkey.com/15098
Tested-by: Jenkins CI <d95b56ce41a2e1ac4cecdd398defd7414407cc08@spacemonkey.com>
Reviewed-by: Erik Nolte <c195b508e6f0c57aeafdb5e96947e2b79e6a4b40@spacemonkey.com>

spacemonkeygo/monkit