Bug 33897: (QA follow-up) Correct code for tab selection

Bug 33897: (QA follow-up) Correct code for tab selection

This patch corrects the code for selecting tabs other than the first
tab.

To test, apply the patch and view the bibliographic detail page for a
serial record and with various settings of the opacSerialDefaultTab
system preference.

If you select "subscriptions tab" the subscriptions tab should be active
by default.

You can also enable html5media and view a record with html5media
information and no holdings. The media tab should be displayed by
default.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>