Bug 12005 : Creating a new zebra connection for each time we need one

Bug 12005 : Creating a new zebra connection for each time we need one

Zebra is not designed to have persistent connections, under cgi this
didn't matter the scripts would get a new connection each time, but
under plack we try to use dead connections

This patch changes it so plack works the same way that cgi did.

To test:
Apply this patch
Do some searches
Check everything still works

Signed-off-by: Jacek Ablewicz <abl@biblos.pk.edu.pl>
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>