ENYO-2177: Invalidate attributes to ensure changes...
ENYO-2177: Invalidate attributes to ensure changes...

...will be preserved when re-rendering a Control. We were already
doing this in the special case of the `classes` attribute, but not
in the more general case, so post-render changes made via
`setAttribute()` were being lost if the control were subsequently
re-rendered.

Enyo-DCO-1.1-Signed-Off-By: Gray Norton (gray.norton@lge.com)

enyojs/enyo,PKRoma/enyo,enyojs/enyo,PKRoma/enyo