ICSHWI-7061 Interpret iocs_to_deploy as a CSV
When specifying extra variables to a playbook only strings are supported so we have to accept a string of comma separated IOCs and convert it to a 'proper' list.
- If
iocs_to_deploy
is not specified then all IOCs in the inventory will be considered for deployment. - If
iocs_to_deploy
is an empty string then no IOC will be deployed.