Bug 25409: Add missing "required" class to template

Bug 25409: Add missing "required" class to template

Added "required" class to "itemtype" label in "onboardingstep5.tt"
template.

To test:
    1) Start new instalation. During onboarding tool phase you will be
       requested to create a new circulation rule.
    2) Observe that "itemtype" label has no "required" class.
    3) Apply patch.
    4) Repeat step 2 (you can reload circulation rule creation page).
    5) Observe the error is gone.

Mentored-by: Peter Vashchuk <stalkernoid@gmail.com>
Mentored-by: Andrew Nugged <nugged@gmail.com>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>