Merge branch 'fix-avs-mac-address-table' into 'master'

Generic.get_mac_address_table. Fix getting mac address tables by SNMP.

See merge request !3420

(cherry picked from commit 9cf55aea)

75e4bed3 Generic.get_mac_address_table. Fix getting mac address tables by SNMP.
be7db4d6 Fix black.
9 jobs for !3422 with cherry-pick-9cf55aea in 15 minutes and 47 seconds (queued for 3 seconds)
merge request