Revert "Add link to centos image"
Revert "Add link to centos image"

This reverts commit f9cdc5dd88f3a359167bc03750ad98acca965f99.

I should not have approved this. The origin of the image is in question.

Change-Id: I084c39eba4c0dc62d9c752da08c1b5ead89a4759

tellesnobrega/sahara,mapr/sahara,esikachev/scenario,keedio/sahara,xme1226/sahara,keedio/sahara,mapr/sahara,tellesnobrega/storm_plugin,matips/iosr-2015,esikachev/scenario,xme1226/sahara,crobby/sahara,henaras/sahara,bigfootproject/sahara,esikachev/sahara-backup,xme1226/sahara,zhangjunli177/sahara,redhat-openstack/sahara,henaras/sahara,egafford/sahara,esikachev/scenario,tellesnobrega/sahara,matips/iosr-2015,zhujzhuo/Sahara,citrix-openstack-build/sahara,tellesnobrega/storm_plugin,bigfootproject/sahara,openstack/sahara,esikachev/sahara-backup,redhat-openstack/sahara,zhujzhuo/Sahara,tellesnobrega/storm_plugin,ekasitk/sahara,henaras/sahara,ekasitk/sahara,redhat-openstack/sahara,crobby/sahara,matips/iosr-2015,citrix-openstack-build/sahara,egafford/sahara,ekasitk/sahara,zhangjunli177/sahara,openstack/sahara,zhujzhuo/Sahara,mapr/sahara,zhangjunli177/sahara,esikachev/sahara-backup,citrix-openstack-build/sahara,crobby/sahara,bigfootproject/sahara,keedio/sahara