Fixes and add smoke test: hard timeout on isolated task.

appengine/swarming/tools/start_servers.py

 #!/usr/bin/env python
 # Copyright 2015 The Swarming Authors. All rights reserved.
 # Use of this source code is governed by the Apache v2.0 license that can be
 # found in the LICENSE file.
 
 """Starts local Swarming and Isolate servers."""
 
 import argparse
 import os
 import shutil
@@ skipping 41 matching lines @@
     self._isolate_server = local_app.LocalApplication(
         os.path.join(APP_DIR, '..', 'isolate'), 10050, self._listen_all)
     self._isolate_server.start()
     self._swarming_server.ensure_serving()
     self._isolate_server.ensure_serving()
 
     self.http_client.login_as_admin('smoke-test@example.com')
     self.http_client.url_opener.addheaders.append(
         ('X-XSRF-Token', self._swarming_server.client.xsrf_token))
 
-  def stop(self):
+  def stop(self, leak):
     """Stops the local Swarming and Isolate servers.
 
     Returns the exit code with priority to non-zero.
     """
     exit_code = None
     try:
       if self._isolate_server:
-        exit_code = exit_code or self._isolate_server.stop()
+        exit_code = exit_code or self._isolate_server.stop(leak)
     finally:
       if self._swarming_server:
-        exit_code = exit_code or self._swarming_server.stop()
+        exit_code = exit_code or self._swarming_server.stop(leak)
     return exit_code
 
   def wait(self):
     """Wait for the processes to normally exit."""
     if self._isolate_server:
       self._isolate_server.wait()
     if self._swarming_server:
       self._swarming_server.wait()
 
   def dump_log(self):
@@ skipping 10 matching lines @@
   servers = LocalServers(args.all)
   try:
     servers.start()
     print('Swarming: %s' % servers.swarming_server.url)
     print('Isolate : %s' % servers.isolate_server.url)
     servers.wait()
     servers.dump_log()
   except KeyboardInterrupt:
     print >> sys.stderr, '<Ctrl-C> received; stopping servers'
   finally:
-    exit_code = servers.stop()
+    exit_code = servers.stop(False)
   return exit_code
 
 
 if __name__ == '__main__':
   sys.exit(main())