Change to build notifications

I know we agreed to sort out our notification emails at the meeting
yesterday but I also thought that Danny and I would come up with a better
overall strategy so I'm not sure why we're changing things already.

Anyway, for those who missed this on the skype chat:

[Tuesday, 5 November 2013 18:59:08 Biyeun Buczyk] hi all, jenkins build
notificatons now come from commcarehq-noreply+jenkins@dimagi.com

Simon

··· -- Simon Kelly Senior Engineer | Dimagi South Africa