How to include the full chain (CA and/or intermediates) when using "openshift_master_named_certificates" variable

Issue

During cluster installations or when doing a retrofit, custom certificates can be configured using the openshift_master_named_certificates and openshift_master_overwrite_named_certificates parameters, which are configurable in the inventory file as follows:

openshift_master_overwrite_named_certificates=true 
openshift_master_named_certificates=[{"certfile": "/path/on/host/to/crt-file", "keyfile": "/path/on/host/to/key-file", "names": ["public-master-host.com"], "cafile": "/path/on/host/to/ca-file"}] 

Especially when using a self-signed CA of your own, it will be necessary to also include the CA and/or intermediate certificates within the chain in order to validate the certificate (like the cluster does with default certificates), however, this variable, despite accepting cafile as an optional parameter, it will not concatenate that optional CA within the certfile, it will only include it as part of global /etc/origin/master/ca-bundle.crt.