Add unittest framework + tests for wrapper scripts

This commit adds a framework for running unittests on tempest to
verify that tempest works as expect. The first tests added are to
verify the response codes of the test runner wrapper scripts we use
on jenkins jobs.

Change-Id: If8e91238054593999e7b5bc34da499bd0ac02311
diff --git a/tempest/tests/files/failing-tests b/tempest/tests/files/failing-tests
new file mode 100644
index 0000000..0ec5421
--- /dev/null
+++ b/tempest/tests/files/failing-tests
@@ -0,0 +1,25 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2013 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.
+
+import testtools
+
+class FakeTestClass(testtools.TestCase):
+    def test_pass(self):
+        self.assertTrue(False)
+
+    def test_pass_list(self):
+        test_list = ['test', 'a', 'b']
+        self.assertIn('fail', test_list)