fix blehr queue python 2 3 compatibility

examples/bluetooth/nimble/blehr/blehr_test.py

@@ -19,9 +19,13 @@ import os
 import re
 import threading
 import traceback
-import Queue
 import subprocess
 
+try:
+    import Queue
+except ImportError:
+    import queue as Queue
+
 from tiny_test_fw import Utility
 import ttfw_idf
 from ble import lib_ble_client