Skara needs to explicitly set resolution to "Fixed" when resolving Jira issues, at least for JBS, as the default resolution is about to change. It seems "Fixed" is a standard value in Jira, so it should be safe to hard code this for now until there is an actual reason to configure this.

API description: https://docs.atlassian.com/software/jira/docs/api/REST/8.20.1/#issue-doTransition