Before this patch, we would only get logged the client to server side of
the communication. The OVN allow-related ACL option was implemented 
so as to be able to log also the packets that are going from server to
client. This patch implements the addition of that feature in Neutron
and needs OVN version 22.03 or updated 21.12.
Signed-off-by: Elvira García <firstname.lastname@example.org>