Add absolute_import future imports

Add absolute_import from __future__ so that pylint
does not fail and to achieve python3 behavior in
python2.

Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

ipaplatform/constants.py

@@ -3,6 +3,8 @@
 #
 """IpaMetaImporter replaces this module with ipaplatform.$NAME.constants.
 """
+from __future__ import absolute_import
+
 import ipaplatform._importhook
 
 ipaplatform._importhook.fixup_module('ipaplatform.constants')