INCR-386 python3 compatibility

scripts/vulture/whitelist.py

@@ -5,6 +5,8 @@
 # add them below. This file is consumed by
 # scripts/dead_code/find-dead-code.sh
 
+from __future__ import absolute_import
+
 from vulture.whitelist_utils import Whitelist
 
 view_whitelilst = Whitelist()

scripts/xblock/xblock_counts.py

@@ -1,4 +1,5 @@
-from __future__ import print_function
+from __future__ import absolute_import, print_function
+
 import argparse
 import csv
 import json

scripts/xdist/get_worker_test_list.py

@@ -4,12 +4,15 @@ lists of each pytest worker.
 Assumes the following format:
 [test-suite] [worker] RESULT test
 """
-import click
+from __future__ import absolute_import
+
 import io
-import re
 import os
+import re
 import shutil
 
+import click
+
 
 @click.command()
 @click.option(