Tools: autotest: add python headers to scripts

Tools: arduplane.py add python header

Tools: apmrover2.py add python header

Tools: arducopter.py add python header

Tools: ardusub.py add python header

Tools: quadplane.py add python header

Tools/autotest/apmrover2.py

@@ -1,4 +1,6 @@
-# drive APMrover2 in SITL
+#!/usr/bin/env python
+
+# Drive APMrover2 in SITL
 from __future__ import print_function
 import os
 import shutil

Tools/autotest/arducopter.py

@@ -1,11 +1,6 @@
-# fly ArduCopter in SITL
-# Flight mode switch positions are set-up in arducopter.param to be
-#   switch 1 = Circle
-#   switch 2 = Land
-#   switch 3 = RTL
-#   switch 4 = Auto
-#   switch 5 = Loiter
-#   switch 6 = Stabilize
+#!/usr/bin/env python
+
+# Fly ArduCopter in SITL
 from __future__ import print_function
 import math
 import os

Tools/autotest/arduplane.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 # Fly ArduPlane in SITL
 from __future__ import print_function
 import math

Tools/autotest/ardusub.py

@@ -1,4 +1,6 @@
-# drive APMrover2 in SITL
+#!/usr/bin/env python
+
+# Dive ArduSub in SITL
 from __future__ import print_function
 import os
 import shutil

Tools/autotest/quadplane.py

@@ -1,4 +1,6 @@
-# fly ArduPlane QuadPlane in SITL
+#!/usr/bin/env python
+
+# Fly ArduPlane QuadPlane in SITL
 from __future__ import print_function
 import os
 import pexpect