Add extra logs to the ip_monitor class
Add extra logs to the ip_monitor class

Those extra logs should tell more about what IP addresses are
added/removed in the qrouter namespace by the keepalived process and
hopefully help us understand failures in functional CI job,
like are described in the related bug.

Related-bug: #1956958
Change-Id: I5e924922baffbf2e059f243b115ff799e8432a56

openstack/neutron,mahak/neutron,openstack/neutron,mahak/neutron,openstack/neutron,mahak/neutron