Fix Checkstyle violations

* Upgrade to Spring Security `6.0.0-M5`

Author: artembilan

build.gradle

@@ -103,7 +103,7 @@ ext {
     springGraphqlVersion = '1.0.0'
     springKafkaVersion = '3.0.0-M4'
     springRetryVersion = '1.3.3'
-    springSecurityVersion = project.hasProperty('springSecurityVersion') ? project.springSecurityVersion : '6.0.0-M4'
+    springSecurityVersion = project.hasProperty('springSecurityVersion') ? project.springSecurityVersion : '6.0.0-M5'
     springVersion = project.hasProperty('springVersion') ? project.springVersion : '6.0.0-M4'
     springWsVersion = '4.0.0-M2'
     testcontainersVersion = '1.17.1'

spring-integration-jdbc/src/test/java/org/springframework/integration/jdbc/mysql/MySqlContainerTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021 the original author or authors.
+ * Copyright 2021-2022 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.
@@ -19,9 +19,6 @@
 import org.testcontainers.containers.MySQLContainer;
 import org.testcontainers.junit.jupiter.Container;
 import org.testcontainers.junit.jupiter.Testcontainers;
-import org.testcontainers.utility.DockerImageName;
-
-import org.springframework.integration.test.util.TestUtils;
 
 /**
  * The base contract for JUnit tests based on the container for MqSQL.

spring-integration-mqtt/src/test/java/org/springframework/integration/mqtt/MosquittoContainerTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021 the original author or authors.
+ * Copyright 2021-2022 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.
@@ -20,8 +20,6 @@
 import org.testcontainers.junit.jupiter.Container;
 import org.testcontainers.junit.jupiter.Testcontainers;
 
-import org.springframework.integration.test.util.TestUtils;
-
 /**
  *
  * @author Artem Bilan

spring-integration-test-support/src/main/java/org/springframework/integration/test/util/TestUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -21,7 +21,6 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Optional;
 import java.util.Properties;
 import java.util.Set;
 import java.util.concurrent.ThreadPoolExecutor.CallerRunsPolicy;
@@ -375,16 +374,7 @@ public static void revertLogLevels(String methodName, LevelsContainer container)
 		ctx.updateLoggers();
 	}
 
-	public static class LevelsContainer {
-
-		private final Map<Class<?>, Level> classLevels;
-
-		private final Map<String, Level> categoryLevels;
-
-		public LevelsContainer(Map<Class<?>, Level> classLevels, Map<String, Level> categoryLevels) {
-			this.classLevels = classLevels;
-			this.categoryLevels = categoryLevels;
-		}
+	public record LevelsContainer(Map<Class<?>, Level> classLevels, Map<String, Level> categoryLevels) {
 
 	}