LogFactory obtains ClassLoader-specific LoggerContext for Log4J

Issue: SPR-14512

Author: jhoeller

spring-core/src/main/java/org/apache/commons/logging/LogFactory.java

@@ -172,7 +172,8 @@ private static class Log4jLog implements Log, Serializable {
 
 		private static final String FQCN = Log4jLog.class.getName();
 
-		private static final LoggerContext loggerContext = LogManager.getContext();
+		private static final LoggerContext loggerContext =
+				LogManager.getContext(Log4jLog.class.getClassLoader(), false);
 
 		private final ExtendedLogger logger;