These instructions are only needed with EJBCA versions lower than 7.5. With EJBCA 7.5, all keys can be created from inside the Crypto Token interface of the EJBCA Admin Interface.
With EJBCA 7.5, ensure p11ng.cryptotoken.enabled=true
is set in the EJBCA configuration file web.properties (this is done for you in EJBCA Cloud already)