Currently we use the switch interface descriptions in the
switch_interface_config variable with the
kolla_neutron_ml2_generic_switch_trunk_port_hosts variable to generate a list
of ports for each switch that should be added as trunk ports to all networks.
This change allows switch interfaces to be given an 'ngs_trunk_port' boolean
field which can be used to exclude matching interfaces from the list. This
may be useful in cases where a host has multiple interfaces but only some
should be added as trunk ports.
a62ad6b0d3