Upgrade to JUnit Jupiter 5.6

Closes gh-24299

build.gradle

@@ -33,7 +33,7 @@ configure(allprojects) { project ->
 			mavenBom "org.eclipse.jetty:jetty-bom:9.4.26.v20200117"
 			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.3.61"
 			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.3.2"
-			mavenBom "org.junit:junit-bom:5.5.2"
+			mavenBom "org.junit:junit-bom:5.6.0"
 		}
 		dependencies {
 			dependencySet(group: 'org.apache.logging.log4j', version: '2.13.0') {
@@ -368,7 +368,7 @@ configure([rootProject] + javaProjects) { project ->
 			"https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.10/",
 			"https://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/",
 			"https://junit.org/junit4/javadoc/4.12/",
-			"https://junit.org/junit5/docs/5.5.2/api/"
+			"https://junit.org/junit5/docs/5.6.0/api/"
 	] as String[]
 }
 

spring-test/src/test/java/org/springframework/test/context/junit/jupiter/FailingBeforeAndAfterMethodsSpringExtensionTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -82,7 +82,7 @@ class FailingBeforeAndAfterMethodsSpringExtensionTests {
 		Events events = EngineTestKit.engine("junit-jupiter")
 			.selectors(selectClass(testClass))
 			.execute()
-			.tests()
+			.testEvents()
 			.assertStatistics(stats -> stats
 				.skipped(0)
 				.aborted(0)

spring-test/src/test/java/org/springframework/test/context/junit/jupiter/transaction/TimedTransactionalSpringExtensionTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -60,7 +60,7 @@ class TimedTransactionalSpringExtensionTests {
 		Events events = EngineTestKit.engine("junit-jupiter")
 				.selectors(selectClass(TestCase.class))
 				.execute()
-				.tests()
+				.testEvents()
 				.assertStatistics(stats -> stats.started(4).succeeded(2).failed(2));
 
 		events.failed().assertThatEvents().haveExactly(2,