Add paste.filter_factory entrypoint for basic auth middleware

... so that the middleware can be loaded using the python egg instead
of the direct path.

Closes-Bug: #1940738
Change-Id: I57408766c120d2c9784f3886457e91ee7d30de1b

oslo_middleware/__init__.py

@@ -10,7 +10,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-__all__ = ['CatchErrors',
+__all__ = ['BasicAuthMiddleware',
+           'CatchErrors',
            'CorrelationId',
            'CORS',
            'Debug',
@@ -20,6 +21,7 @@ __all__ = ['CatchErrors',
            'RequestBodySizeLimiter',
            'SSLMiddleware']
 
+from oslo_middleware.basic_auth import BasicAuthMiddleware
 from oslo_middleware.catch_errors import CatchErrors
 from oslo_middleware.correlation_id import CorrelationId
 from oslo_middleware.cors import CORS

setup.cfg

@@ -42,6 +42,7 @@ paste.app_factory =
     healthcheck = oslo_middleware:Healthcheck.app_factory
 
 paste.filter_factory =
+    basic_auth = oslo_middleware:BasicAuthMiddleware.factory
     catch_errors = oslo_middleware:CatchErrors.factory
     correlation_id = oslo_middleware:CorrelationId.factory
     cors = oslo_middleware:CORS.factory