Bug#732221: Add python-swiftclient as suggested package list for Duplicity

[David Cole]

Package: Duplicity
Version: 0.6.22-1

In the latest upstream version of duplicity (0.6.22) we have a new backend
for Openstack swift. See:
https://blueprints.launchpad.net/duplicity/+spec/swiftbackend . Please can
the python-swiftclient package be added to the Suggest'ed list for
Duplicity.

Thanks
David.