fix show techsupport error (sonic-net#2597)

*Modify the order of "--allow-process-stop" option, it belongs to 'generate_dump'.

Author: pettershao-ragilenetworks

show/main.py

@@ -1352,15 +1352,15 @@ def techsupport(since, global_timeout, cmd_timeout, verbose, allow_process_stop,
     if global_timeout:
         cmd += " timeout --kill-after={}s -s SIGTERM --foreground {}m".format(COMMAND_TIMEOUT, global_timeout)
 
-    if allow_process_stop:
-        cmd += " -a"
-
     if silent:
         cmd += " generate_dump"
         click.echo("Techsupport is running with silent option. This command might take a long time.")
     else:
         cmd += " generate_dump -v"
 
+    if allow_process_stop:
+        cmd += " -a"
+
     if since:
         cmd += " -s '{}'".format(since)
 

tests/techsupport_test.py

@@ -12,7 +12,7 @@
             ([], 'generate_dump -v -t 5'),
             (['--since', '2 days ago'], "generate_dump -v -s '2 days ago' -t 5"),
             (['-g', '50'], 'timeout --kill-after=300s -s SIGTERM --foreground 50m generate_dump -v -t 5'),
-            (['--allow-process-stop'], '-a generate_dump -v -t 5'),
+            (['--allow-process-stop'], 'generate_dump -v -a -t 5'),
             (['--silent'], 'generate_dump -t 5'),
             (['--debug-dump', '--redirect-stderr'], 'generate_dump -v -d -t 5 -r'),
         ]