private void testDynamicLogLevel(final String bindProtocol, final String connectProtocol,
    final boolean isSpnego, final String newLevel) throws Exception {
    testDynamicLogLevel(bindProtocol, connectProtocol, isSpnego, logName, newLevel);
  }
Creates and starts a Jetty server binding at an ephemeral port to run LogLevel servlet.
@param protocol "http" or "https"
@param isSpnego true if SPNEGO is enabled
@return a created HttpServer object
@throws Exception if unable to create or start a Jetty server
hbase-http/src/test/java/org/apache/hadoop/hbase/http/log/TestLogLevel.java