calico-dhcp-agent doesn't add domain parameter to dnsmasq

[Justin Pacheco]

neutron 13.0.4 introduced a change to the parent class dhcp.Dnsmasq which is inherited by DnsmasqRouted in calico-dhcp-agent. This change removed the member variable self.dns_domain which is used by calico-dhcp-agent to correctly set the --domain dnsmasq parameter to the value set in /etc/neutron/neutron.conf. Without this parameter, vms cannot get their fqdn from dhcp on boot

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/699891

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/699891
Committed: https://git.openstack.org/cgit/openstack/networking-calico/commit/?id=594cf28fb0359c1abf6da1022574be5ddd710a7b
Submitter: Zuul
Branch: master

commit 594cf28fb0359c1abf6da1022574be5ddd710a7b
Author: Justin Pacheco <email address hidden>
Date: Wed Dec 18 19:29:06 2019 -0500

    calico-dhcp-agent dnsmasq domain parameter fix

    neutron 13.0.4 introduced a change to the parent class dhcp.Dnsmasq
    which is inherited by DnsmasqRouted in calico-dhcp-agent. This
    change removed the member variable self.dns_domain which is used by
    calico-dhcp-agent to correctly set the --domain dnsmasq parameter to
    the value set in /etc/neutron/neutron.conf

    this patch updates the subclass DnsmasqRouted to look for the dns_domain
    parameter in the correct location which works with both neutron 13.0.2 and
    13.0.4

    Change-Id: I7a14adcc540408dd4493114a429883ac6c8fe6af
    Closes-Bug: #1856909