GF-9695 AjaxSample Update

Issue: Yahoo API upcoming.events has been removed which was giving the
error message.
Fixes:
1) Used other working Yahoo APIs, e.g., weather.forecast and geo.places
APIs.
2) Used "onyx.Popup" to show failed scenarios. Provided proper error
message.
3) Refreshed textArea.

Enyo-DCO-1.1-Signed-off-by: Anugrah Saxena <anugrah.saxena@lge.com>