Stop Log4j2 configuration to hopefully close the log file

See gh-47424

Author: wilkinsona

core/spring-boot/src/test/java/org/springframework/boot/logging/log4j2/Log4J2LoggingSystemTests.java

@@ -37,7 +37,6 @@
 import org.apache.logging.log4j.core.LoggerContext;
 import org.apache.logging.log4j.core.config.Configuration;
 import org.apache.logging.log4j.core.config.LoggerConfig;
-import org.apache.logging.log4j.core.config.Reconfigurable;
 import org.apache.logging.log4j.core.config.composite.CompositeConfiguration;
 import org.apache.logging.log4j.core.config.plugins.util.PluginRegistry;
 import org.apache.logging.log4j.core.config.xml.XmlConfiguration;
@@ -114,16 +113,8 @@ void setup(TestInfo testInfo) {
 
 	@AfterEach
 	void cleanUp() {
+		this.loggingSystem.getConfiguration().stop();
 		this.loggingSystem.cleanUp();
-		LoggerContext loggerContext = (LoggerContext) LogManager.getContext(false);
-		Configuration configuration = loggerContext.getConfiguration();
-		loggerContext.stop();
-		if (configuration instanceof Reconfigurable reconfigurable) {
-			loggerContext.start(reconfigurable.reconfigure());
-		}
-		else {
-			loggerContext.start(configuration);
-		}
 		PluginRegistry.getInstance().clear();
 	}