This document will clarify what the import_wildfly_ssl_certificates alias is used for.
Virtual Appliance
To expand on the information available in the Available Aliases documentation:
import_wildfly_ssl_certificates -
import_wildfly_ssl_certificates retrieves and compares certificates in the /opt/CA/VirtualAppliance/custom/wildfly-ssl-certificates/ from all VAPP Nodes, does a comparison and then update the keystore on all VAPP nodes with the current certificate.