Bug 17087 - Set Test::WWW::Mechanize version to 1.42

Bug 17087 - Set Test::WWW::Mechanize version to 1.42

This was set to a version that is not available in Wheezy or Jessie.
The version is not required, the only change to 1.42 (packaged for
Wheezy and Jessie) is a fix for Windows, see
http://cpansearch.perl.org/src/PETDANCE/Test-WWW-Mechanize-1.44/Changes

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 893f6cc2633744d4f539fd1b6b9f4b8837277d2d)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>