[minigraph] Donot enable PFC watchdog for MgmtTsToR (sonic-net#1734)

Signed-off-by: Jing Kan [email protected]

Author: Blueve

config/main.py

@@ -1441,7 +1441,7 @@ def load_minigraph(db, no_service_restart):
 
     # get the device type
     device_type = _get_device_type()
-    if device_type != 'MgmtToRRouter' and device_type != 'EPMS':
+    if device_type != 'MgmtToRRouter' and device_type != 'MgmtTsToR' and device_type != 'EPMS':
         clicommon.run_command("pfcwd start_default", display_cmd=True)
 
     # Update SONiC environmnet file