Bug 7853 - opac-maintanance.pl should correctly redirect back to opac-main.pl, if...

Bug 7853 - opac-maintanance.pl should correctly redirect back to opac-main.pl, if no updates are outstanding

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Works exactly as it should according to the test plan. This is a nice
improvement.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Amended patch: Check OpacMaintenance!

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>