Add test to ensure that cloud-config-novajoin.json is valid json

Change-Id: I7934eae30bfe3e2779b05e22ed8fd66e1bf8e149

novajoin/tests/functional/test_cloudinit.py

@@ -0,0 +1,25 @@
+# Copyright 2017 Red Hat, 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 oslo_serialization import jsonutils
+import testtools
+
+
+class CloudInitTest(testtools.TestCase):
+
+    def test_validjson(self):
+        with open('files/cloud-config-novajoin.json', 'r') as f:
+            data = f.read()
+
+        jsonutils.loads(data)