Apply shell shebang for python files before the copyright
diff --git a/src/test/utils/IGMP.py b/src/test/utils/IGMP.py
old mode 100644
new mode 100755
index c91dfdd..3573d6c
--- a/src/test/utils/IGMP.py
+++ b/src/test/utils/IGMP.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 # 
 # Copyright 2016-present Ciena Corporation
 #