atualizando script de sincronizacao do ldap

sigi/apps/servidores/management/commands/sync_ldap.py

@@ -61,7 +61,14 @@ class Command(BaseCommand):
                 except: last_name = ''
                 try: user = User.objects.get(username=username)
                 except User.DoesNotExist:
-                    user = User.objects.create_user(username, email, username)
+                    try:
+                        user = User.objects.get(email=email)
+                        user.username = username
+                    except User.DoesNotExist:
+                        user = User.objects.create_user(
+                            username = username,
+                            email = email
+                        )
                         user.first_name = first_name
                         user.last_name = last_name
                         print "User '%s' created." % username