Polish contribution

Closes gh-7914

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/mvc/LoggersMvcEndpoint.java

@@ -72,7 +72,8 @@ public class LoggersMvcEndpoint extends EndpointMvcAdapter {
 			return getDisabledResponse();
 		}
 		String level = configuration.get("configuredLevel");
-		this.delegate.setLogLevel(name, level == null ? null : LogLevel.valueOf(level.toUpperCase()));
+		LogLevel logLevel = level == null ? null : LogLevel.valueOf(level.toUpperCase());
+		this.delegate.setLogLevel(name, logLevel);
 		return HttpEntity.EMPTY;
 	}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/mvc/LoggersMvcEndpointTests.java

@@ -1,6 +1,5 @@
 /*
  * Copyright 2012-2017 the original author or authors.
- * Copyright 2016-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -63,7 +62,6 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
  *
  * @author Ben Hale
  * @author Phillip Webb
- * @author Kazuki Shimizu
  */
 @RunWith(SpringRunner.class)
 @SpringBootTest