When checking database connection, the Launcher must reuse all template and user properties

If the default database connection parameters make use of other (custom) properties, this is properly managed by the "nuxeoctl configure" action and the generated files will be correct but this is not managed by the "check database connection" action.

In org.nuxeo.launcher.config.ConfigurationGenerator.checkDatabaseConnection(String, String, String, String, String, String), the TextTemplate must be initialized with templateProperties and userConfig.