Since the train release neutron adds routes with protocol static.
Keepalived also adds the same routes with different protocols depending
on the keepalived version. This can result in duplicated routes inside
network namespaces. On l3 agent restarts those duplicate routes
then prevent the l3 agent from updating its router state
because it runs into 'RTNETLINK answers: File exists expections'
when it tries to execute 'ip route' commands.
This patch adds the same protocol static to each virtual route of
keepalived's configuration so network namespaces do not run into
duplicated routes anymore.
Closes-Bug: #1956846
Change-Id: Ic35b5d4b9110b832c10345c45ec62c0923237cfd
c813b658d0