Arvados

The Packer templates for our Jenkins images create a node with a jenkins user and use that for all setup. This is mixing concerns: the initial user that needs sudo access to set up the node image doesn't need to be the jenkins user which does not need sudo access at all, etc.

The Ansible playbooks for test images have been written to make it possible to run the playbook as an admin user and have it set up the jenkins account separately. We just need to add SSH authorized key(s) for Jenkins, and figure out if we want to set up any other access methods like sysadmin accounts or at least keys in an admin account. Do that.