contrib_bots: Fix python 3 lint errors.

contrib_bots/bots/converter/converter.py

@@ -8,7 +8,7 @@ import importlib
 import sys
 from math import log10, floor
 
-import utils
+from . import utils
 import re
 
 def is_float(value):

contrib_bots/bots/converter/tests.py

@@ -1,4 +1,5 @@
-import converter
+from __future__ import absolute_import
+from . import converter
 
 def test():
     for cmd, expected_response in sample_conversation():

contrib_bots/bots/encrypt/tests.py

@@ -1,4 +1,4 @@
-import encrypt_bot
+from . import encrypt
 
 def test():
     for cmd, expected_response in sample_conversation():
@@ -11,7 +11,7 @@ def test():
 
             def send_message(self, params):
                 self.output = params['content']
-        handler = encrypt_bot.EncryptHandler()
+        handler = encrypt.EncryptHandler()
         client_dummy = ClientDummy()
         handler.handle_message(message, client_dummy, '')
         if client_dummy.output != expected_response:

contrib_bots/bots/howdoi/howdoi.py

@@ -12,6 +12,8 @@ Note:
       required by `howdoi`.
 """
 
+from __future__ import absolute_import
+
 import sys
 import logging
 from textwrap import fill