The artifact bundle carried the guest console and the spinifex journals but
nothing from OVN, so a phase 6 egress failure could not be attributed to an
unresolved gateway nexthop MAC versus a return-path or upstream problem.
Register an OnFailure at the top of phase 6 that writes
static-mac-binding-list, the SB MAC_Binding table and the VPC router's
lr-route-list into the bundle.
Julian Sommer
894fe84255