In test_only_accepted_traffic_logged, after using the
check_remote_connectivity function, a small lapse of time needs
to be left in order for the last ping to get to the host. This
sleep is already present in other validations like
"check_east_west_icmp_flow".
Furthermore, using ovn_pinctrl0 will get all the ovn logs, as
opposed to using acl_logs in the grep to the log file that happens
in _get_logs_and_counts.
Change-Id: I337c964a9f39b97d4d66600321a7a9c468336e9d
98b5177a87