pylint: fix old-style-class

Reviewed-By: Tomas Krizek <tkrizek@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>

ipaclient/ipachangeconf.py

@@ -48,7 +48,7 @@ def openLocked(filename, perms):
     #TODO: put section delimiters as separating element of the list
     #      so that we can process multiple sections in one go
     #TODO: add a comment all but provided options as a section option
-class IPAChangeConf:
+class IPAChangeConf(object):
 
     def __init__(self, name):
         self.progname = name