fix isort

Change-Id: I5486e1f9b3143c6bb0804c49c7ca21adb9b84de1
Reviewed-on: https://forge.frm2.tum.de/review/19524
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Tested-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>

test/conftest.py

@@ -1,4 +1,6 @@
 # content of conftest.py
+from __future__ import division, print_function
+
 import pytest
 
 
@@ -15,5 +17,6 @@ def constants():
 
 
 @pytest.fixture(scope="session")
+# pylint: disable=redefined-builtin
 def globals():
     return dict()