Change dashes to underscore in setup.cfg
Change dashes to underscore in setup.cfg

Recent versions of setuptools are warning that usage of dash-separated
keys will not be supported in future versions.

Change-Id: Ie2e4f8b4d593985c128c3ffbbd476bc7b79b5db4

ChameleonCloud/blazar,openstack/blazar,openstack/blazar,ChameleonCloud/blazar