Use natsort instead of sort for sorting the asic list in disable_pfcw…

…d and enable_pfcwd functions. (#16176)

Description of PR
Summary:
Even after #15863, the problem is still seen in RP. The issue is that the sort() function only sorts alphabetically, not numerically. So we need to use natsort module instead of normal sort() in these functions.

Approach
What is the motivation for this PR?
Seeing a lot of loganalyzer messages, but in RP only.

How did you do it?
Change sort to natsort().

How did you verify/test it?
Running in my TB, I don't see the LA error anymore.

Any platform specific information?
T2 mAsic only.

co-authorized by: [email protected]

tests/common/snappi_tests/qos_fixtures.py

@@ -1,6 +1,7 @@
 import pytest
 import time
 import json
+from natsort import natsorted
 from tests.common.snappi_tests.common_helpers import \
         stop_pfcwd, disable_packet_aging, enable_packet_aging
 from tests.override_config_table.utilities import get_running_config
@@ -125,7 +126,7 @@ def get_pfcwd_config(duthost):
         all_configs = []
         output = duthost.shell("ip netns | awk '{print $1}'")['stdout']
         all_asic_list = output.split("\n")
-        all_asic_list.sort()
+        all_asic_list = natsorted(all_asic_list)
         all_asic_list.insert(0, None)
         for space in all_asic_list:
             config = get_running_config(duthost, space)
@@ -145,7 +146,7 @@ def reapply_pfcwd(duthost, pfcwd_config):
     elif type(pfcwd_config) is list:
         output = duthost.shell("ip netns | awk '{print $1}'")['stdout']
         all_asic_list = output.split("\n")
-        all_asic_list.sort()
+        all_asic_list = natsorted(all_asic_list)
         all_asic_list.insert(0, None)
 
         all_files = []