autotest: run GetCapabilities test on all vehicles

Tools/autotest/apmrover2.py

@@ -4947,10 +4947,6 @@ Brakes have negligible effect (with=%0.2fm without=%0.2fm delta=%0.2fm)
 
             ("GetBanner", "Get Banner", self.do_get_banner),
 
-            ("GetCapabilities",
-             "Get Capabilities",
-             self.test_get_autopilot_capabilities),
-
             ("DO_SET_MODE",
              "Set mode via MAV_COMMAND_DO_SET_MODE",
              self.test_do_set_mode_via_command_long),

Tools/autotest/balancebot.py

@@ -115,10 +115,6 @@ inherit Rover's tests!'''
 
             ("GetBanner", "Get Banner", self.do_get_banner),
 
-            ("GetCapabilities",
-             "Get Capabilities",
-             self.test_get_autopilot_capabilities),
-
             ("DO_SET_MODE",
              "Set mode via MAV_COMMAND_DO_SET_MODE",
              self.test_do_set_mode_via_command_long),

Tools/autotest/common.py

@@ -2162,7 +2162,7 @@ class AutoTest(ABC):
 
     def get_autopilot_capabilities(self):
         # Cannot use run_cmd otherwise the respond is lost during the wait for ACK
-        self.mav.mav.command_long_send(1,
+        self.mav.mav.command_long_send(self.sysid_thismav(),
                                        1,
                                        mavutil.mavlink.MAV_CMD_REQUEST_AUTOPILOT_CAPABILITIES,
                                        0,  # confirmation
@@ -4946,6 +4946,10 @@ switch value'''
             ("Parameters",
              "Test Parameter Set/Get",
              self.test_parameters),
+
+            ("GetCapabilities",
+             "Get Capabilities",
+             self.test_get_autopilot_capabilities),
         ]
 
     def post_tests_announcements(self):