[java] Added a check for intentionally existing loggers (#14754)

Added a check for intentionally existing loggers

A check for the handlers property of the LogManager is added
as to ensure that intentionally existing loggers such as ones
defined in the logging.properties file are not overwritten

Fixes #14160

Co-authored-by: Viet Nguyen Duc <[email protected]>
Co-authored-by: Puja Jagani <[email protected]>
Co-authored-by: Diego Molina <[email protected]>

Author: 4 people

java/src/org/openqa/selenium/grid/log/LoggingOptions.java

@@ -98,6 +98,9 @@ public void configureLogging() {
       return;
     }
 
+    // Keep current loggers if they are being manually set
+    if (LogManager.getLogManager().getProperty("handlers") != null) return;
+
     // Remove all handlers from existing loggers
     LogManager logManager = LogManager.getLogManager();
     Enumeration<String> names = logManager.getLoggerNames();