The RMIConnectorServer.CREDENTIAL_TYPES constant was removed

This rule flags references to the RMIConnectorServer.CREDENTIAL_TYPES constant and jmx.remote.rmi.server.credential.types string literal. The RMIConnectorServer.CREDENTIAL_TYPES constant was removed in Java SE 15. The constant can be replaced with the RMIConnectorServer.CREDENTIALS_FILTER_PATTERN constant and a filter pattern.

For more information on these changes, see Removed Features and Options in Java SE 15.