Comment 4 for bug 1572033

OK, so the work-around is:
1) Download network coinfig:
fuel --env 1 network download
2) Fix VLAN tags for networks (update "vlan_start" for networks in "networks" hash)
3) Upload network config:
fuel --env 1 network upload

After that deployment worked. So lowering priority to medium for 8.0 and 9.0.
But we still need to figure out how vlans got changed.