pep8 fixes

nova/auth/ldapdriver.py

@@ -73,6 +73,7 @@ LOG = logging.getLogger("nova.ldapdriver")
 #             creating this now because I'm expecting an auth refactor
 #             in which we may want to change the interface a bit more.
 
+
 def _clean(attr):
     """Clean attr for insertion into ldap"""
     if attr is None:
@@ -81,6 +82,7 @@ def _clean(attr):
         return str(attr)
     return attr
 
+
 def sanitize(fn):
     """Decorator to sanitize all args"""
     def _wrapped(self, *args, **kwargs):