Make baremetal driver use Flavor object instead of VirtAPI

This makes the baremetal driver use the Flavor object instead of
getting that information through the VirtAPI/conductor call.

Related to blueprint compute-manager-objects

Change-Id: I1cbc3fc77bbbcaa3c194f12814893c5937fb6e96
Merge "Make baremetal driver use Flavor object instead of VirtAPI"