Give context to the warning in _sync_power_states

The "Found x in the database and y on the hypervisor"
warning in the logs doesn't give any context to what
is happening when that is logged, this adds the context.

Change-Id: I8800006508b2e18de657aa0a8d135bcd17cb89f1
Merge "Give context to the warning in _sync_power_states"