Revert "move single host setup activities to setup_host"

This reverts commit e0df323af67940d6e2951828d3a2289591ab9301.

This is necessary as the changes made in this change are not self test
able and they broke the gate. Revert for now giving us time to write a
proper fix.

Change-Id: Ifda95f159d5ae5818d2674b00824e5adead4b486