qsub-wrap: also update doc strings after changing default values

qsub-wrap.py

@@ -247,9 +247,9 @@ if __name__ == '__main__':
                         default='wetb_py3')
     parser.add_argument('-q', '--queue', type='string', dest='queue',
                         help='name of the PBS queue: workq or xpresq. '
-                        'defaults to xpresq', default='workq')
+                        'Defaults to workq', default='workq')
     parser.add_argument('-w', '--walltime', type='string', dest='walltime',
-                        help='walltime, in HH:MM:SS. Default=00:29:59',
+                        help='walltime, in HH:MM:SS. Default=02:00:00',
                         default='02:00:00')
     parser.add_argument('--dry', action='store_true', dest='dry', default=False,
                         help='dry run: do not submit pbs file.')