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/debian/constants.py

@@ -7,6 +7,8 @@ This Debian family platform module exports platform dependant constants.
 '''
 
 # Fallback to default path definitions
+from __future__ import absolute_import
+
 from ipaplatform.base.constants import BaseConstantsNamespace
 
 

ipaplatform/debian/paths.py

@@ -8,6 +8,8 @@ in Debian-based systems.
 """
 
 # Fallback to default path definitions
+from __future__ import absolute_import
+
 from ipaplatform.base.paths import BasePathNamespace
 import sysconfig
 

ipaplatform/debian/services.py

@@ -6,6 +6,8 @@
 Contains Debian-specific service class implementations.
 """
 
+from __future__ import absolute_import
+
 from ipaplatform.base import services as base_services
 from ipaplatform.redhat import services as redhat_services
 from ipapython import ipautil

ipaplatform/debian/tasks.py

@@ -6,6 +6,8 @@
 This module contains default Debian-specific implementations of system tasks.
 """
 
+from __future__ import absolute_import
+
 from ipaplatform.base.tasks import BaseTaskNamespace
 from ipaplatform.redhat.tasks import RedHatTaskNamespace