Replace logging with oslo_log.
Replace logging with oslo_log.

The oslo.log (logging) configuration library provides standardized
configuration for all openstack projects. It also provides custom
formatters, handlers and support for context specific logging (like
resource id's etc).

Change-Id: Iadecf4c5e6c220ca98f06dcc2f683a536c55822d

egafford/sahara,openstack/sahara,egafford/sahara,openstack/sahara,tellesnobrega/sahara,tellesnobrega/sahara