How to specify JUL logging configuration properties file

[meltsufin]

Re-posting a direct query from user:

In App Engine Standard, we used to have this in appengine-web.xml but now in app.yaml

system_properties:
  java.util.logging.config.file: WEB-INF/logging.properties

It doesn’t seem to work however, INFO messages are still logged, even though it is set to WARNING.