Now that we are routinely using Skara to manage updates to the closed and open `jtreg` repos, it would be good to configure these repos to auto-update JBS when a MR/PR is pushed.

Repos:
* closed: https://orahub.oci.oraclecorp.com/jpg-dev/jtreg
* open: https://github.com/openjdk/jtreg

Do we need to specify somewhere/somehow the value for `Fix Version` field?