Use self.ks_logger instead of ks_logger

Currently with '--debug' option any cinder command only logs the
request from keystoneauth and not the main cinder service request.

Added keystoneauth logger to self.ks_logger so that logs can be
logged as expected.

Closes-Bug: #1606814

Change-Id: I7193aa6f43cb3186c49fc409b6e1ce7a36f596f9

cinderclient/shell.py

@@ -469,8 +469,8 @@ class OpenStackCinderShell(object):
         if hasattr(requests, 'logging'):
             requests.logging.getLogger(requests.__name__).addHandler(ch)
 
-        ks_logger = logging.getLogger("keystoneauth")
-        ks_logger.setLevel(logging.DEBUG)
+        self.ks_logger = logging.getLogger("keystoneauth")
+        self.ks_logger.setLevel(logging.DEBUG)
 
     def _delimit_metadata_args(self, argv):
         """This function adds -- separator at the appropriate spot

cinderclient/tests/unit/test_shell.py

@@ -228,6 +228,17 @@ class ShellTest(utils.TestCase):
 
         self.assertEqual(False, _shell.cs.client.verify_cert)
 
+    @mock.patch.object(cinderclient.client.SessionClient, 'authenticate',
+                       side_effect=exceptions.Unauthorized('No'))
+    def test_session_client_debug_logger(self, mock_session):
+        _shell = shell.OpenStackCinderShell()
+        # This "fails" but instantiates the client.
+        self.assertRaises(exceptions.CommandError, _shell.main,
+                          ['--debug', 'list'])
+        # In case of SessionClient when --debug switch is specified
+        # 'keystoneauth' logger should be initialized.
+        self.assertEqual('keystoneauth', _shell.cs.client.logger.name)
+
     @mock.patch('keystoneauth1.session.Session.__init__',
                 side_effect=RuntimeError())
     def test_http_client_with_cert(self, mock_session):