For distributed vlan in ovn we need to add support of
creating mac addresses per compute and seting them in
external_ids:ovn-chassis-mac-mappings.
Depends-On: https://review.opendev.org/782763
Related-Bug: #1881593
Change-Id: I785400969efba0062aabdca9af2726a7603ef840
(cherry picked from commit ef44eebdc5)
(cherry picked from commit 06f2a09393)