Since vanilla and chocolate are on the same VLAN, we don't have
two different bifrost machines, just one to handle both.
Therefore, the per-region split logic is not needed anymore and makes
it impossible to have on the current baremetal machine in prod
having both inventories at the same time.
Note: I'm leaving the 'region' parameter on purpose, otherwise
the apply tests fail.
Will remove it in a subsequent patch.
Change-Id: I433cdb8675c3acd2e699272aaf6a0e67eb9200b0
cff7cf98dc