Bug 10587: fix HTML errors on authority detail page in OPAC

Bug 10587: fix HTML errors on authority detail page in OPAC

A validator check of the OPAC's authority detail returns a few minor
errors. This patch corrects the errors.

To test, apply the patch and run an OPAC authority detail page through
an HTML validator. There should be no errors which are specific to the
authorities detail template (as opposed to header and footer includes).

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
All tests and QA script pass.
Also checked using the W3C validator and testing the
authority detail page in the OPAC is still correctly
displayed.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 452a4b7775ce10655543aa81f670e2fb497ccc9b)
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>