[install] Fix Ceilometer + Nova in Debian
[install] Fix Ceilometer + Nova in Debian

This patch adds Debian to the conditional when configuring
Nova with Ceilometer.

Change-Id: Ia5b68d4e17a449c560be0de83a0c3400326834dd

AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals