Merge pull request #20832 from dreis2211

* pr/20832:
  Update copyright year
  Fix WebappLoader constructor deprecations

Closes gh-20832

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatReactiveWebServerFactory.java

@@ -149,7 +149,7 @@ public class TomcatReactiveWebServerFactory extends AbstractReactiveWebServerFac
 		context.addLifecycleListener(new Tomcat.FixContextListener());
 		context.setParentClassLoader(ClassUtils.getDefaultClassLoader());
 		skipAllTldScanning(context);
-		WebappLoader loader = new WebappLoader(context.getParentClassLoader());
+		WebappLoader loader = new WebappLoader();
 		loader.setLoaderClass(TomcatEmbeddedWebappClassLoader.class.getName());
 		loader.setDelegate(true);
 		context.setLoader(loader);

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatServletWebServerFactory.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -222,7 +222,7 @@ public class TomcatServletWebServerFactory extends AbstractServletWebServerFacto
 			// Tomcat is < 8.5.39. Continue.
 		}
 		configureTldSkipPatterns(context);
-		WebappLoader loader = new WebappLoader(context.getParentClassLoader());
+		WebappLoader loader = new WebappLoader();
 		loader.setLoaderClass(TomcatEmbeddedWebappClassLoader.class.getName());
 		loader.setDelegate(true);
 		context.setLoader(loader);