UAIG test case 88 is invalid

Per the ARIA spec. aria-selected must be set by the author to get the
selected state. IOW selected does not automatically follow focus:

http://www.w3.org/WAI/PF/aria/roles#tab

"In either case, authors SHOULD ensure that a selected tab has its
aria-selected attribute set to true, that inactive tab elements have their
aria-selected attribute set to false, and that the currently selected tab
provides a visual indication that it is selected. In the absence of an
aria-selected attribute on the current tab, user agents SHOULD indicate to
assistive technologies through the platform accessibility API that the
currently focused tab is selected."

Since selection does not follow focus automatically, the corresponding
event notification does not apply in the UAIG with respect to following
focus.

So, I am marking this test as invalid and NOT required for CR.

Rich