Add AT&T Labs Research email domain
Add AT&T Labs Research email domain

AT&T Labs is a part of AT&T. Many people in AT&T's research organization
have email addresses in the research.att.com domain.

Change-Id: I38f4643234e578b3daa7590f25fb776413dbc647

mohitsethi/stackalytics,0xf2/stackalytics,Code-Fly/stackalytics,openstack/stackalytics,Mirantis/stackalytics,openstack/stackalytics,Mirantis/stackalytics,stackforge/stackalytics,openstack/stackalytics,mhharsh/stackalytics,0xf2/stackalytics,stackforge/stackalytics,mohitsethi/stackalytics,Code-Fly/stackalytics,0xf2/stackalytics,mhharsh/stackalytics,mohitsethi/stackalytics,mhharsh/stackalytics,Code-Fly/stackalytics,stackforge/stackalytics,openstack/stackalytics,0xf2/stackalytics,Mirantis/stackalytics