[CORD-3022] Splitting config

Change-Id: If53017fb35e41ea0536afa14369bd525549c019c
diff --git a/xos/synchronizer/vtn-synchronizer.py b/xos/synchronizer/vtn-synchronizer.py
index e1126e5..e9b9c98 100755
--- a/xos/synchronizer/vtn-synchronizer.py
+++ b/xos/synchronizer/vtn-synchronizer.py
@@ -21,8 +21,13 @@
 import sys
 from xosconfig import Config
 
-config_file = os.path.abspath(os.path.dirname(os.path.realpath(__file__)) + '/vtn_config.yaml')
-Config.init(config_file, 'synchronizer-config-schema.yaml')
+base_config_file = os.path.abspath(os.path.dirname(os.path.realpath(__file__)) + '/config.yaml')
+mounted_config_file = os.path.abspath(os.path.dirname(os.path.realpath(__file__)) + '/mounted_config.yaml')
+
+if os.path.isfile(mounted_config_file):
+    Config.init(base_config_file, 'synchronizer-config-schema.yaml', mounted_config_file)
+else:
+    Config.init(base_config_file, 'synchronizer-config-schema.yaml')
 
 sys.path.append('/opt/xos')