Ports with device_owner like:
* floating_ip,
* DHCP,
* some types of router ports, like: HA interface interface,
* distributed ports,
don't need to be configured in the dnsmasq file.
So there is no need to reload dnsmasq every time when such port is
added/updated to the network.
This patch adds skip in such case which should improve load on the
Neutron DHCP agent.
Closes-Bug: #1913269
Change-Id: I63221507713b941c261cdf88781133149da8ab8d
(cherry picked from commit e4bbeee206)
1239ac5023