Fix a bug where the sim time request failed

Change python-yaml depend tag to use the Python 3 version. Simplifies ins…

Co-authored-by: jpliquid <65894393+jpliquid@users.noreply.github.com>

Add support for Python3 dependencies with rosdep tags. Simplifies installing dependencies on Noetic.

Signed-off-by: Thomas Denewiler <thomas.denewiler@navy.mil>

Fix deprecated syntax warnings in sensor package

Many bug fixes in the assistants, ctrl_cascaded_pids, ctrl_utils, teleop, tutorial packages

Fixed a buggy loop condition
Fixed syntax errors in python and launch files
Improved and refactored parts of the code

Update CI workflow with a scheduled event

Massive code cleanup

Add a Github Action for continuous integration tests

Minor changes in gazebo_ros_plugins to display more information during the tests