Redundant test dependencies in package.xml of motion_capture_tracking

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

I noticed the `package.xml` files in the package `motion_capture_tracking` contains the following content which means a format check.
```
ament_lint_auto
ament_lint_common
```
But the test section in `CMakeLists.txt` is commented out resulting in no testing programs to run actually.

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`.

If we do not need the ament_lint_tools, 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!

Inspect the package.xml files for motion_capture_tracking and the commented test section in CMakeLists.txt. Determine whether ament lint checks are intended to run; done means either enabling the documented checks or removing the redundant test dependencies, with the package configuration and build remaining consistent.

Written by the indexing model from the issue text.