Fix token flush fails with recursion depth exception

keystone-manage token_flush was failing with a recursion depth
exception error. This is because when a property was referenced in
token.persistence.Manager it would go into an infinite recursion
trying to resolve it. token.persistence.PersistenceManager should
have been used instead.

Note that I added a test for keystone.cli TokenFlush, but for some
reason it doesn't actually expose the problem. I'll leave it there
since it increases coverage.

Change-Id: If5af4fe0811a59157c2f68d06c264815409689e1
Closes-Bug: #1363224

keystone/cli.py

@@ -172,7 +172,7 @@ class TokenFlush(BaseApp):
 
     @classmethod
     def main(cls):
-        token_manager = token.persistence.Manager()
+        token_manager = token.persistence.PersistenceManager()
         token_manager.driver.flush_expired_tokens()
 
 

keystone/tests/test_cli.py

@@ -0,0 +1,29 @@
+# Copyright 2014 IBM Corp.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+from keystone import cli
+from keystone import tests
+from keystone.tests.ksfixtures import database
+
+
+class CliTestCase(tests.SQLDriverOverrides, tests.TestCase):
+    def config_files(self):
+        config_files = super(CliTestCase, self).config_files()
+        config_files.append(tests.dirs.tests_conf('backend_sql.conf'))
+        return config_files
+
+    def test_token_flush(self):
+        self.useFixture(database.Database())
+        self.load_backends()
+        cli.TokenFlush.main()