autotest: default to mavlink10

Tools/autotest/autotest.py

@@ -103,11 +103,11 @@ parser.add_option("--skip", type='string', default='', help='list of steps to sk
 parser.add_option("--list", action='store_true', default=False, help='list the available steps')
 parser.add_option("--viewerip", default=None, help='IP address to send MAVLink and fg packets to')
 parser.add_option("--experimental", default=False, action='store_true', help='enable experimental tests')
-parser.add_option("--mav10", action='store_true', default=False, help="Use MAVLink protocol 1.0")
+parser.add_option("--mav09", action='store_true', default=False, help="Use MAVLink protocol 0.9")
 
 opts, args = parser.parse_args()
 
-if opts.mav10 or os.getenv('MAVLINK10'):
+if not opts.mav09:
     os.environ['MAVLINK10'] = '1'
     import mavlinkv10 as mavlink
 else: