Upgrade to Logback 1.1.5

Closes gh-5212

spring-boot-dependencies/pom.xml

@@ -112,7 +112,7 @@
 		<liquibase.version>3.4.2</liquibase.version>
 		<log4j.version>1.2.17</log4j.version>
 		<log4j2.version>2.4.1</log4j2.version>
-		<logback.version>1.1.3</logback.version>
+		<logback.version>1.1.5</logback.version>
 		<mariadb.version>1.2.3</mariadb.version>
 		<mockito.version>1.10.19</mockito.version>
 		<mongodb.version>2.13.3</mongodb.version>

spring-boot/src/main/java/org/springframework/boot/logging/logback/LogbackLoggingSystem.java

@@ -122,6 +122,7 @@ public class LogbackLoggingSystem extends Slf4JLoggingSystem {
 						"${logging.pattern.level:${LOG_LEVEL_PATTERN:%5p}}"));
 		new DefaultLogbackConfiguration(initializationContext, logFile)
 				.apply(configurator);
+		context.setPackagingDataEnabled(true);
 	}
 
 	@Override