firewall: packet blocking log for DENY rule

rest_firewall outputs packet blocking log.
However it was not output about DENY rules,
 it outputted only table-miss packets.
This patch improves it.

Signed-off-by: WATANABE Fumitaka <watanabe.fumitaka1@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>