Bug 32612: (QA follow-up) Add BINMODE method to C4::SIP::Trapper

Bug 32612: (QA follow-up) Add BINMODE method to C4::SIP::Trapper

The module Log::Log4perl::Appender::Screen is attempting to change
binmode during unit tests for SIPServer and is failing because of
our tie in SIPServer.pm for reasons unknown.

This patch implements the perltie method TIEHANDLE which allows the
binmode to be handled in the C4::SIP::Trapper package.

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit d00d07cae751986a220d114ff165cbf5206a0283)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>