Write script for Redmine that creates a new release process ticket
Write a script that uses the redmine API to:
- create a new issue on a given sprint "Release Arvados X.Y.Z"
- create numbered subtasks for all the steps on the release checklist https://dev.arvados.org/projects/arvados/wiki/Release_Checklist
- create a new release called "Arvados X.Y.(Z+1)" if it doesn't exist