[bug][ROS1] Warning from roslaunch is taken as error.

[ranchhandrobotics]

• Linux: Ubuntu 20.04
• ROS 1: Noetic

<Version of the plugin>
0.8.4
<Copy the Version information from the Help | About menu>
1.74.1

what is the bug

Warning from roslaunch is taken as error.

Repro steps

I use an open-source repo where the package naming convention was not followed. There is a package named ORB_SLAM3.

1. When I run the ROS:Launch profile I receive the following error:
   Error from roslaunch:
   WARNING: Package name "ORB_SLAM3" does not follow the naming conventions. It should start with a lower case letter and only contain lower case letters, digits, underscores and dashes.

expected behavior

roslaunch does not fail on warning.

additional context

I wouldn't like to change the repo name because it might confuse other users later.

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Original issue: ms-iot/vscode-ros#894