xpresq on jess is limted to 30 minutes

qsub-wrap.py

@@ -250,8 +250,8 @@ if __name__ == '__main__':
                         'defaults to xpresq',
                         default='xpresq')
     parser.add_argument('-w', '--walltime', type='string', dest='walltime',
-                        help='walltime, in HH:MM:SS. Default=00:59:59',
-                        default='00:59:59')
+                        help='walltime, in HH:MM:SS. Default=00:29:59',
+                        default='00:29:59')
     parser.add_argument('--dry', action='store_true', dest='dry', default=False,
                         help='dry run: do not submit pbs file.')