Change unstable test which gets console output

We don't necessarily get "REBOOT" status of a server because the
state is ephemeral. As the result, the test fails sometimes.
This patch changes the server status from "REBOOT" to "SHUTOFF" for
stable test condition.

Closes-Bug: #1014683
Change-Id: I4b06b148b5d9bceda0cef2d2bb5f3b72325928ac
Merge "Change unstable test which gets console output"