@Test
  public void testErrorLogLevel() throws Exception {
    testDynamicLogLevel(LogLevel.PROTOCOL_HTTP, LogLevel.PROTOCOL_HTTP, true, "ERROR");
  }
Test setting log level to "Error".
@throws Exception if client can't set log level to ERROR.
hbase-http/src/test/java/org/apache/hadoop/hbase/http/log/TestLogLevel.java