Fix deprecation warning

Author: philwebb

spring-boot/src/main/java/org/springframework/boot/context/embedded/tomcat/TomcatEmbeddedServletContainerFactory.java

@@ -725,11 +725,12 @@ private void callMethod(Object target, String name, Object value, Class<?> type)
 
 	/**
 	 * {@link LifecycleListener} that stores an empty merged web.xml. This is critical for
-	 * Jasper to prevent warnings about missing web.xml files and to enable EL.
+	 * Jasper on Tomcat 7 to prevent warnings about missing web.xml files and to enable
+	 * EL.
 	 */
 	private static class StoreMergedWebXmlListener implements LifecycleListener {
 
-		private final String MERGED_WEB_XML = org.apache.tomcat.util.scan.Constants.MERGED_WEB_XML;
+		private final String MERGED_WEB_XML = "org.apache.tomcat.util.scan.MergedWebXml";
 
 		@Override
 		public void lifecycleEvent(LifecycleEvent event) {