Bug 25409: Add missing "Required" text and "required" classes

Bug 25409: Add missing "Required" text and "required" classes

Highlight text with red by adding “required” class to the label and added red
“Required” text next to select field in "onboardingstep5.tt" template.

To test:
    1) Start new installation. During onboarding tool phase you will be
       requested to create a new circulation rule.
    2) Observe that "Units" label has no "required" class and that
       there’s no “Required” text next to a select field.
    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: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>