Optimized group updating during host move

In addition,
- Added a fix for host remove issue
- Added a fix for single homed (loc1) to dual homed (loc2).

Change-Id: I1a7344bd77f73d6bed8955dcdbf407b5354d0eee
5 files changed
tree: 117f08c4d4d4639d247d6b4f9a8a786a467f4d56
  1. BUILD
  2. app/
  3. web/