Tools: update path for sub test missions files

Tools/autotest/ArduSub_Tests/DiveMission/sub_mission.txt

@@ -0,0 +1,7 @@
+QGC WPL 110
+0	0	0	16	0.000000	0.000000	0.000000	0.000000	-35.363262	149.165237	583.969971	1
+1	0	3	16	0.000000	0.000000	0.000000	0.000000	33.809780	-118.393982	-50.000000	1
+2	0	3	16	0.000000	0.000000	0.000000	0.000000	33.809780	-118.394432	-50.000000	1
+3	0	3	16	0.000000	0.000000	0.000000	0.000000	33.810310	-118.394432	-50.000000	1
+4	0	3	18	1.000000	0.000000	50.000000	1.000000	33.810310	-118.395020	-25.000000	1
+5	0	3	21	25.000000	0.000000	0.000000	0.000000	33.811207	-118.393036	-25.000000	1

Tools/autotest/ArduSub_Tests/GripperMission/sub-gripper-mission.txt

@@ -0,0 +1,8 @@
+QGC WPL 110
+0	0	0	16	0.000000	0.000000	0.000000	0.000000	33.810313	-118.393867	0	1
+1	0	3	22	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	-5.000000	1
+2	0	3	16	0.000000	0.000000	0.000000	0.000000	33.810612	-118.393867	0.000000	1
+3	0	0	211	0.000000	1.000000	0.000000	0.000000	0.000000	0.000000	0.000000	1
+4	0	3	16	0.000000	0.000000	0.000000	0.000000	33.810612	-118.393578	0.000000	1
+5	0	0	211	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	0.000000	1
+4	0	3	16	0.000000	0.000000	0.000000	0.000000	33.810612	-118.393588	0.000000	1

Tools/autotest/ardusub.py

@@ -51,6 +51,9 @@ class AutoTestSub(AutoTest):
     def test_filepath(self):
          return os.path.realpath(__file__)
 
+    def set_current_test_name(self, name):
+        self.current_test_name_directory = "ArduSub_Tests/" + name + "/"
+
     def default_mode(self):
         return 'MANUAL'
 
@@ -69,9 +72,6 @@ class AutoTestSub(AutoTest):
     def is_sub(self):
         return True
 
-    def arming_test_mission(self):
-        return os.path.join(testdir, "ArduSub-Missions", "test_arming.txt")
-
     def watch_altitude_maintained(self, delta=0.5, timeout=5.0):
         """Watch and wait for the actual altitude to be maintained