Parameterizing timeout values in the code has been discussed in #937 and during the weekly meetings. I am opening this issue up for further discussion.

Some questions for the discussion.

• Should we parameterize all the hard coded magic numbers?
• What is the best way to parametrize these values, so we don't end up having a lot of parameters in one file? Maybe categorizing them as required parameters, optional parameters or advanced parameters etc.
• Where should we set these parameters nav2 params file, launch etc?