Use underscores instead of dashes in setup.cfg

[ivanpauno]

Fixes https://ci.ros2.org/view/nightly/job/nightly_linux_release/1890/consoleFull#console-section-485 and similar

Starting >>> examples_rclpy_minimal_publisher
03:48:02 /home/jenkins-agent/workspace/nightly_linux_release/venv/lib/python3.8/site-packages/setuptools/dist.py:642: UserWarning: Usage of dash-separated 'script-dir' will not be supported in future versions. Please use the underscore name 'script_dir' instead
03:48:02   warnings.warn(
03:48:02 /home/jenkins-agent/workspace/nightly_linux_release/venv/lib/python3.8/site-packages/setuptools/dist.py:642: UserWarning: Usage of dash-separated 'install-scripts' will not be supported in future versions. Please use the underscore name 'install_scripts' instead
03:48:02   warnings.warn(
03:48:03 /home/jenkins-agent/workspace/nightly_linux_release/venv/lib/python3.8/site-packages/setuptools/dist.py:642: UserWarning: Usage of dash-separated 'script-dir' will not be supported in future versions. Please use the underscore name 'script_dir' instead
03:48:03   warnings.warn(
03:48:03 /home/jenkins-agent/workspace/nightly_linux_release/venv/lib/python3.8/site-packages/setuptools/dist.py:642: UserWarning: Usage of dash-separated 'install-scripts' will not be supported in future versions. Please use the underscore name 'install_scripts' instead
03:48:03   warnings.warn(
03:48:03 

[ivanpauno]

CI:

• Linux
• Linux-aarch64
• macOS
• Windows

[ivanpauno]

It seems that there's something wrong in the CI scripts on Windows, and it cannot handle either of:

• --packages-up-to-regex "examplesrclpy.*|sensor_msgs_py"
• --packages-select-regex "examplesrclpy.*|sensor_msgs_py"

Another way of building/testing the same:

• Windows