Fixes #315

Problem: Adds internal/external data-group support

Author: f5-rahm

f5/bigip/tm/ltm/test/test_datagroup.py

@@ -16,6 +16,7 @@
 import mock
 import pytest
 
+
 from f5.bigip import ManagementRoot
 from f5.bigip.resource import MissingRequiredCreationParameter
 from f5.bigip.tm.ltm.data_group import Internal, External