[CORD-3022] Adding an option to provide an extra configuration

Change-Id: Iaef5d7bc6041b76f2896f9fcf91a0072e78ad0c2
diff --git a/lib/xos-config/tests/confs/extend_conf.yaml b/lib/xos-config/tests/confs/extend_conf.yaml
new file mode 100644
index 0000000..dd888e3
--- /dev/null
+++ b/lib/xos-config/tests/confs/extend_conf.yaml
@@ -0,0 +1,17 @@
+
+# Copyright 2017-present Open Networking Foundation
+#
+# 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.
+
+
+xos_dir: /opt/xos
\ No newline at end of file