Python 2.7x and 3.xx compatibility fixes

Change-Id: I84eb3bf7691fa867acadf9dae8c4f56a9781bf73
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/bin/validate_plug_ins.py b/bin/validate_plug_ins.py
index 9c0a1fd..ba4cebb 100755
--- a/bin/validate_plug_ins.py
+++ b/bin/validate_plug_ins.py
@@ -1,7 +1,11 @@
 #!/usr/bin/env python
 
 import sys
-import __builtin__
+try:
+    import __builtin__
+except ImportError:
+    import builtins as __builtin__
+
 import os
 
 # python puts the program's directory path in sys.path[0].  In other words,