Bug 10259 - koha-*-zebra scripts are expected to run without warnings if no instance...

Bug 10259 - koha-*-zebra scripts are expected to run without warnings if no instance name passed

Commented out the code that checks for intance name parameters on the zebra service handling scripts.
It restores the original behaviour, while leaving error checking code.

Regards
To+

Sponsored-by: Universidad Nacional de Córdoba
Signed-off-by: Robin Sheat <robin@catalyst.net.nz>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
(cherry picked from commit f937d41dbfb5440a0451fbc9cf648339f1566bd3)

Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>