Use key alias to access the private key of a keystore

Current Situation

• The Controller and Agent make use of a keystore for server and client authentication certificates (private keys).
• A keystore can hold any number of private keys. There is no reasonable mechanism in Java to auto-select the matching private key from a keystore.

Desired Behavior

• JS7 Controller and Agent should allow from the configuration in the private.conf file to optionally specify the alias name of the certificate to be used.
  • The setting is made with js7.web.https.keystore.alias = "ALIAS"
    Example

     js7 {   
        web {
            # Locations of keystore and truststore files for HTTPS connections
            https {
                keystore {
                    # Default: ${js7.config-directory}"/private/https-keystore.p12"
                    file=${js7.config-directory}"/private/https-keystore.p12"
                    key-password=jobscheduler
                    store-password=jobscheduler
                    # optional alias
                    alias=jobscheduler
                }
            }
        }
    }
    

• The KeyStore class should be provided the alias name found in the private.conf file.