New test for configuration show

Creates a new common file for configuration tests.

Change-Id: Id4c26759dfec5d508b762d0b54386f258a362971

functional/tests/common/test_configuration.py

@@ -0,0 +1,23 @@
+#    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 functional.common import test
+
+BASIC_CONFIG_HEADERS = ['Field', 'Value']
+
+
+class ConfigurationTests(test.TestCase):
+
+    def test_configuration_show(self):
+        raw_output = self.openstack('configuration show')
+        items = self.parse_listing(raw_output)
+        self.assert_table_structure(items, BASIC_CONFIG_HEADERS)