add mock hardware test to build tests

Author: URJala

ur_robot_driver/CMakeLists.txt

@@ -230,6 +230,11 @@ if(BUILD_TESTING)
   find_package(ur_msgs REQUIRED)
   find_package(launch_testing_ament_cmake)
 
+  add_launch_test(test/test_mock_hardware.py
+    TIMEOUT
+      800
+  )
+
   if(${UR_ROBOT_DRIVER_BUILD_INTEGRATION_TESTS})
     add_launch_test(test/launch_args.py
       TIMEOUT