Teach sky_server how to use more threads and not drop requests

sky/tools/sky_server

 #!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import argparse
 import cherrypy
 import json
 import os
 import staticdirindex
@@ skipping 25 matching lines @@
     parser.add_argument('port', type=int)
     configuration.add_arguments(parser)
     args = parser.parse_args()
 
     log_dir = os.path.abspath(os.getcwd())
 
     paths = Paths(os.path.join('out', args.configuration))
 
     config = {
         'global': {
+            # Cherrypy appears to just drop requests if it doesn't have
+            # a thread to service them, so set our thread_pool high enough
+            # so that a z620 can run all the tests w/o timeouts.
+            'server.thread_pool': 30,
             'server.socket_port': args.port,
             'tools.staticdir.content_types' : {
                 'sky': 'text/sky',
             },
             'log.screen': args.verbose,
             'log.access_log': os.path.join(log_dir, 'access_log.txt'),
             # This causes some strange python exception??
             # 'log.error_log': os.path.join(log_dir, 'error_log.txt'),
         },
         '/': {
@@ skipping 12 matching lines @@
         '/sky/services': {
             'tools.staticdir.on': True,
             'tools.staticdir.dir': os.path.join(paths.gen_root, 'sky', 'services'),
         },
      }
     cherrypy.quickstart(config=config)
 
 
 if __name__ == '__main__':
     main()