Add Mars to contributor list
Add Mars to contributor list

Change-Id: I15dbe049cd4aeb9e79b5e139c919dabc4d810a88

openstack/stackalytics,0xf2/stackalytics,Mirantis/stackalytics,stackforge/stackalytics,openstack/stackalytics,Mirantis/stackalytics,stackforge/stackalytics,Mirantis/stackalytics,0xf2/stackalytics,stackforge/stackalytics,0xf2/stackalytics,openstack/stackalytics,0xf2/stackalytics,openstack/stackalytics