Bug 7760: Add unique ids and a module class to all authorities pages

Bug 7760: Add unique ids and a module class to all authorities pages

This is the first patch for bug 7760 and touches all pages in authorities.
This adds a unique id "auth_<filename>" and a class "auth" to the body tag of
each page in the authorities module.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>