building out new RDS2 Mock.

completed:
 * create_db_instance()
 * create_option_group()

tests/test_rds2/test_server.py

@@ -0,0 +1,20 @@
+from __future__ import unicode_literals
+
+import sure  # noqa
+
+import moto.server as server
+from moto import mock_rds2
+
+'''
+Test the different server responses
+'''
+
+
+#@mock_rds2
+#def test_list_databases():
+#    backend = server.create_backend_app("rds2")
+#    test_client = backend.test_client()
+#
+#    res = test_client.get('/?Action=DescribeDBInstances')
+#
+#    res.data.decode("utf-8").should.contain("<DescribeDBInstancesResult>")