How to configure the number of tests that can be run concurrently?

[Kate-Lyndegaard]

Hi,

How can I configure the number of tests that can be run concurrently?

The original PR seems to introduce it as settings for the configuration file: https://github.com/etf-validator/etf-webapp/pull/193/files

In the main ETF repository on the current branch and in the last release it seems to be available to set as environment variable (though it's not clear how exactly PropertyUtils is implemented here): https://github.com/etf-validator/etf-webapp/blob/bfefb319ea887785c8f9fcdecec0ed62aa39facc/etf-webapp/src/main/java/de/interactive_instruments/etf/webapp/controller/TestRunController.java#L108

Any information would be greatly appreciated.