fix import in DeleteThread_Test

UnitTests/DeleteThread_Test.py

@@ -6,9 +6,9 @@ import queue
 from time import time, sleep
 import logging
 from copy import deepcopy
+import sys
 
 if __name__ == '__main__':
-    import sys
     from os.path import dirname, abspath, join
     SCRIPT_DIR = abspath(join(dirname(__file__), '../Script'))
     sys.path.append(SCRIPT_DIR)