CLOUDSTACK-7854: Don't have CentOS 5.3 built-in template when we've 5.6
CLOUDSTACK-7854: Don't have CentOS 5.3 built-in template when we've 5.6

Signed-off-by: Rohit Yadav <902b9eb5dd62819678163bd5e00fbf0cbc7c264b@shapeblue.com>
(cherry picked from commit 318f7159a0f1456e1058e6dee43887b4683310de)
Signed-off-by: Rohit Yadav <902b9eb5dd62819678163bd5e00fbf0cbc7c264b@shapeblue.com>

resmo/cloudstack,jcshen007/cloudstack,resmo/cloudstack,wido/cloudstack,resmo/cloudstack,resmo/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,wido/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,wido/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,wido/cloudstack,GabrielBrascher/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,GabrielBrascher/cloudstack,wido/cloudstack,GabrielBrascher/cloudstack,wido/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,resmo/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack