Figure out why running oh-my-zsh playbook stops Ansible working

[yalisassoon]

Seems to be to do with the switch in shell, which changes the $PATH...

[yalisassoon]

As part of the ansible setup on the VM, an installation script is run: source ./hacking/env-setup. This is responsible for adding ansible to the path for example. Likely that we will need to add a step to the oh-my-zsh playbook that checks for the existence of ansible, and reruns the script if it sees it.