autotest: fixed import of mavwp

Tools/autotest/apmrover2.py

@@ -2,7 +2,8 @@
 
 import util, pexpect, sys, time, math, shutil, os
 from common import *
-import mavutil, random
+from pymavlink import mavutil
+import random
 
 # get location of scripts
 testdir=os.path.dirname(os.path.realpath(__file__))

Tools/autotest/arducopter.py

@@ -2,7 +2,8 @@
 
 import util, pexpect, sys, time, math, shutil, os
 from common import *
-import mavutil, mavwp, random
+from pymavlink import mavutil, mavwp
+import random
 
 # get location of scripts
 testdir=os.path.dirname(os.path.realpath(__file__))

Tools/autotest/arduplane.py

@@ -2,7 +2,8 @@
 
 import util, pexpect, sys, time, math, shutil, os
 from common import *
-import mavutil, random
+from pymavlink import mavutil
+import random
 
 # get location of scripts
 testdir=os.path.dirname(os.path.realpath(__file__))

Tools/autotest/common.py

@@ -1,4 +1,5 @@
-import util, pexpect, time, math, mavwp
+import util, pexpect, time, math
+from pymavlink import mavwp
 
 # a list of pexpect objects to read while waiting for
 # messages. This keeps the output to stdout flowing