Fix pep8
Fix pep8

As of 23c8bb4c4de0b866bbf31c15878400462b900e61 the oscutils import
is no longer used, which fails pep8.

Change-Id: I6194ddc5a2ddd2c3e2dbaa7b74711bb1d14be310

openstack/python-tripleoclient,rdo-management/python-rdomanager-oscplugin