1. Update process connection state in discovery SubscribeResponseHandler
   even when the received response is the same as the cached response
   to avoid incorrectly reporting process connection state as
   Initializing if an intermediate failure happens after a
   previous success response.
2. In contrail-vrouter-agent, check for connection state not UP
   instead of DOWN when declaring process state as non-functional to
   handle scenario when process connection state is stuck in
   Initializing.

Closes-Bug: #1349266
Change-Id: I352d8659bed0f996f2ae8a8333f20857a475b152
Merge "1. Update process connection state in discovery SubscribeResponseHandler    even when the received response is the same as the cached response    to avoid incorrectly reporting process connection state as    Initializing if an intermediate failure happens after a    previous success response. 2. In contrail-vrouter-agent, check for connection state not UP    instead of DOWN when declaring process state as non-functional to    handle scenario when process connection state is stuck in    Initializing."