Fix oslo imports to new paths - ssp followon
Fix oslo imports to new paths - ssp followon

Followon to 162298 for new file ssp.py: update oslo.config import to
oslo_config.

Change-Id: Ibd63bd3a7cfef68a6b6337bfd4a203b91d092295

stackforge/nova-powervm,openstack/nova-powervm,stackforge/nova-powervm,openstack/nova-powervm