Check if nailgun's requirements do not conflict

Added simple test that will try to parse nailgun's
requirements and see if there are any problems with them.

Change-Id: I342eda0a3b019780e0d452455734591aab91f6e9
Closes-Bug: #1462281

nailgun/nailgun/test/unit/test_requirements.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+
+#    Copyright 2015 Mirantis, Inc.
+#
+#    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 pkg_resources import require
+
+
+def test_check_requirements_conflicts():
+    require('nailgun')