Move logs of restore state to inner logic

Currently when we rebuild instance, we will restore instance state
if it's STOPPED, but we will log it whenever it's STOPPED or not.
This may confusing operator and for ACTIVE/ERROR state, it's useless.
Also, adds instance into log to provide more info.

Change-Id: I0685484ee0b56c250071c8c9322d2ed053449fd3
Merge "Move logs of restore state to inner logic"