Use the version of python3-colcon-common-extensions in the docker image
Updating python3-colcon-common-extensions updates pytest which causes it to break. It looks like a lot of this stuff is already in the docker image now - not necessary to apt-get update it.
Updating python3-colcon-common-extensions updates pytest which causes it to break. It looks like a lot of this stuff is already in the docker image now - not necessary to apt-get update it.