Merge pull request #774 from edx/feanil/update-ansible-provision

Update base AMIs.

util/jenkins/ansible-provision.sh

@@ -75,9 +75,9 @@ fi
 
 if [[ -z $ami ]]; then
   if [[ $server_type == "full_edx_installation" ]]; then
-    ami="ami-0dd1ef64"
+    ami="ami-bd6b6ed4"
   elif [[ $server_type == "ubuntu_12.04" ]]; then
-    ami="ami-d0f89fb9"
+    ami="ami-a73264ce"
   fi
 fi