python3: getstatusoutput() moved to subprocess module

py3 eliminates the commands module but supports getstatusoutput() via the
subprocess module. This change enables py3 but keeps py2 compatibility.

Signed-off-by: Andy Grover <agrover@redhat.com>

Author: Andy Grover

setup.py

@@ -3,7 +3,10 @@
 from __future__ import print_function
 
 from distutils.core import setup, Extension
-import commands
+try:
+    import commands
+except ImportError:
+    import subprocess as commands
 import sys
 
 version = '0.11'