Modify Queue module import to support python 2/3

Author: hballard

tests/test_subscription_transport.py

@@ -8,7 +8,6 @@
 import copy
 import json
 import os
-import Queue
 import sys
 import threading
 import time
@@ -36,6 +35,11 @@
 else:
     import subprocess
 
+if sys.version_info[0] < 3:
+    import Queue
+else:
+    import queue as Queue
+
 TEST_PORT = 5000
 KEEP_ALIVE_TEST_PORT = TEST_PORT + 1
 EVENTS_TEST_PORT = TEST_PORT + 5