Bug 15218: (Plack) Make processes that rely on background jobs run in CGI mode

Bug 15218: (Plack) Make processes that rely on background jobs run in CGI mode

This patch adds an entry to the plack-related apache configuration so the
problematic scripts (that fail under plack/starman) are not processed through
Plack but in CGI mode instead.

To test:
- Follow the setup steps from bug 15032
- Add the line from this patch to /etc/koha/apache-shared-intranet-plack.conf
 (if you are on kohadevbox you should probably change the filesystem path to
  /home/vagrant/kohaclone/tools/background-job-process.pl)
- Do the full import process of MARC data.
=> SUCCESS: It works as expected.
- Sign off :-D

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>