Bug 19547: Deal with --create-db missing debian.cnf issue

Bug 19547: Deal with --create-db missing debian.cnf issue

Followed test plan. Patch functions as described and both commands execute.
Signed-off-by: Dilan Johnpullé <dilan@calyx.net.au>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 931db23ee369580bbaf137547accef5a8f47412e)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>