Cherry-pick of Master PR

Fix sonic-util command failure on Multi-asic platforms. #5503

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>

Author: abdosi

src/sonic-py-common/sonic_py_common/multi_asic.py

@@ -1,5 +1,6 @@
 import glob
 import os
+import subprocess
 
 from natsort import natsorted
 from swsssdk import ConfigDBConnector