Redundant test dependencies in package.xml of robotiq_hardware_tests and robotiq_description

[Plumezz]

Hello, after building and testing this project with branch develop, I found something unexpected.

I noticed the package.xml files in the package robotiq_hardware_tests and robotiq_description contains the following content which means a format check.

  <test_depend>ament_lint_auto</test_depend>
  <test_depend>ament_lint_common</test_depend>

But there are no test section in CMakeLists.txt .

So I think if we want the ament_lint tools to do a format check, maybe need add the testing section in the CMakeLists.txt like following:

if(BUILD_TESTING)
  find_package(ament_lint_auto REQUIRED)
  ament_lint_auto_find_test_dependencies()
endif()

After adding the content, amen_lint_tools like ament_copyright, ament_lint_cmake, ament_xmllint should be executed correctly.

If we do not need the ament_lint_tools, I think the test_depend might be a redundant dependency that could be removed to reduce the burden of project maintenance.

I would appreciate it if you could tell me how do you think of this?

Thanks!