Refactor: Rename joint_reference_interfaces_ to reference_interface_n…

[TheDevMystic]

Hello, ros_controllers maintainers. This is indeed, my first contribution.

Here I changed the following files,

1. ackermann_steering_controller/test/test_ackermann_steering_controller.hpp
2. bicycle_steering_controller/test/test_bicycle_steering_controller.hpp
3. steering_controllers_library/test/test_steering_controllers_library.hpp

I renamed every instance of joint_reference_interfaces_
to reference_interface_names_.

Regards,
TheDevMystic (Surya)

[destogl]

Thank you!

[christophfroehlich]

Thank you for tackling your first issue.
Please follow our contributing guidelines as linked in the first issue: Ensure that your code builds and tests pass before you submit a PR. In this case, you have only renamed the defined variables but not their usage in the code.

[TheDevMystic]

Thank you very much dear ros_controllers maintainers. It seems like I was too focused on core goal that I missed crucial quality check. Please be reassured that I'll fix it.