Matthias Wessendorf just sort of, I have downloaded https://github.com/openshift/openshift-ansible/tree/release-3.7, run the

ansible-playbook -i .config/openshift/hosts ./openshift-ansible/playbooks/byo/openshift-cluster/upgrades/v3_7/upgrade.yml

ansible-playbook -i .config/openshift/hosts ./openshift-ansible/playbooks/byo/openshift-cluster/service-catalog.yml 

and then Ryan Hallisey (rhallisey on #asbroker on freenode) pointed me to https://gist.github.com/AdamSaleh/0bd4b328d6d745f661ab10c2dfc8290b
which is just the deploy part of their install-script. There might be a bug in there with getting the cert?

Fortunately asbroker is just an openshift project so after removing it, making sure the BROKER_CA_CERT is populated with the correct thing and re-running the sh script, it started to work