mission_test: fix px4tools func import

integrationtests/python_src/px4_it/mavros/mission_test.py

@@ -47,7 +47,7 @@ import glob
 import json
 import math
 import os
-import px4tools
+from px4tools import ulog
 import sys
 from mavros import mavlink
 from mavros_msgs.msg import Mavlink, Waypoint, WaypointReached
@@ -295,9 +295,9 @@ class MavrosMissionTest(MavrosTestCommon):
         rospy.loginfo("mission done, calculating performance metrics")
         last_log = get_last_log()
         rospy.loginfo("log file {0}".format(last_log))
-        data = px4tools.read_ulog(last_log).concat(dt=0.1)
-        data = px4tools.compute_data(data)
-        res = px4tools.estimator_analysis(data, False)
+        data = ulog.read_ulog(last_log).concat(dt=0.1)
+        data = ulog.compute_data(data)
+        res = ulog.estimator_analysis(data, False)
 
         # enforce performance
         self.assertTrue(abs(res['roll_error_mean']) < 5.0, str(res))