5775734c93eb8f1b82c590673ab82d20deeca69f Tests: Update for change to …

…move the aria-title to the sorting role=button element.

ba292272441e8cb0f155d421688711a7cf7280f2 changed the element that the
aria-title was attached to fix an accessability issue resulting from the
sorting icon now being the one with the role=button attribute.

That caused tests to fail, and they have now been updated to account for
that.

One point to make is that an aria-label on the header element is not
transferred to the sorting button (actually a `span`).

Sync to source repo @5775734c93eb8f1b82c590673ab82d20deeca69f

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "2.2.1",
-    "last-sync": "833c60e8ca18dde698cc0d661af23ad47946d52c"
+    "last-sync": "5775734c93eb8f1b82c590673ab82d20deeca69f"
 }