Use oslo.log instead of incubated code

Also use namespaceless oslo.config

Change-Id: I9bb01bd1e6154b8bc2aa82848b45fdd411c24fb7

stackalytics/processor/config.py

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from oslo.config import cfg
+from oslo_config import cfg
 
 
 OPTS = [