Add an option to the global configuration of the Gerrit Trigger Plugin to limit the number of parallel trigger jobs for the same user. This feature will limit the amount of resources a single user can use, so that a user that pushes many commits at the same time cannot block other users by consuming all available nodes.

I have implemented a prototype of this feature already, but before making the code production ready and creating a pull request, I wanted to know if this is a feature you would want in the plugin at all, or if you would rather see it in a separate plugin.