# defaults to '%stackname%-{{role.name.lower()}}-%index%'
# sets the default for {{role.name}}HostnameFormat parameter in overcloud.yaml
#
+# disable_constraints: (boolean) optional, whether to disable Nova and Glance
+# constraints for each role specified in the templates.
+#
# ServicesDefault: (list) optional default list of services to be deployed
# on the role, defaults to an empty list. Sets the default for the
# {{role.name}}Services parameter in overcloud.yaml