Give forms and search fields proper ARIA roles

http://blog.paciellogroup.com/2013/02/using-wai-aria-landmarks-2013/#tablex

http://www.w3.org/TR/wai-aria/roles#form

http://www.w3.org/TR/wai-aria/roles#search
Merge pull request #9352 from kevinSuttle/aria-forms

Give forms and search fields proper ARIA roles