By default the log level for elastic search appears to be set at INFO.
I want to bump this to DEBUG. However, I don't have a configuration
directory with the logging.yml file to configure. Is there a setting I
can add programatically (e.g. - to the Builder settings) to change
Builder settings = ImmutableSettings.settingsBuilder();
//settings.put("rootLogger", "DEBUG, console, file"); //something like
NodeBuilder nBuilder = nodeBuilder().settings(settings);