twister: Use natural sort when generating hardware map

Use the natural sort of list when generating a hardware map. The
list is sorted with a serial port as a key. When more than 10 ports
are active and some of devices use more than one port, the ports
of one device may be listed in wrong sequence, which may cause
futher problems with selecting the right port for listening to
the device.

Signed-off-by: Grzegorz Chwierut <grzegorz.chwierut@nordicsemi.no>

scripts/pylib/twister/twisterlib/hardwaremap.py

@@ -13,6 +13,7 @@ import yaml
 import scl
 import logging
 from pathlib import Path
+from natsort import natsorted
 
 from twisterlib.environment import ZEPHYR_BASE
 
@@ -321,7 +322,7 @@ class HardwareMap:
 
     def save(self, hwm_file):
         # use existing map
-        self.detected.sort(key=lambda x: x.serial or '')
+        self.detected = natsorted(self.detected, key=lambda x: x.serial or '')
         if os.path.exists(hwm_file):
             with open(hwm_file, 'r') as yaml_file:
                 hwm = yaml.load(yaml_file, Loader=SafeLoader)

scripts/requirements-run-test.txt

@@ -7,6 +7,7 @@ pyocd>=0.35.0
 
 # used by twister for board/hardware map
 tabulate
+natsort
 
 # used by mcuboot
 cbor>=1.0.0