test-commandserver: remove unused repopath argument from check()

Instead of repopath, check() will receive connect() function as argument.
It will allow to connect to server of different mode.

contrib/hgclient.py

@@ -62,9 +62,9 b' def runcommand(server, args, output=sys.'
             if ch.isupper():
                 return
 
-def check(func, repopath=None):
+def check(func):
     sys.stdout.flush()
-    server = connect(repopath)
+    server = connect()
     try:
         return func(server)
     finally: