Clean up warnings and tests in spring-core

spring-core/src/main/java/org/springframework/core/env/AbstractEnvironment.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -364,7 +364,7 @@ public abstract class AbstractEnvironment implements ConfigurableEnvironment {
 	}
 
 	@Override
-	@SuppressWarnings("unchecked")
+	@SuppressWarnings({ "unchecked", "rawtypes" })
 	public Map<String, Object> getSystemEnvironment() {
 		if (suppressGetenvAccess()) {
 			return Collections.emptyMap();
@@ -408,7 +408,7 @@ public abstract class AbstractEnvironment implements ConfigurableEnvironment {
 	}
 
 	@Override
-	@SuppressWarnings("unchecked")
+	@SuppressWarnings({ "unchecked", "rawtypes" })
 	public Map<String, Object> getSystemProperties() {
 		try {
 			return (Map) System.getProperties();

spring-core/src/main/java/org/springframework/util/concurrent/ListenableFutureCallbackRegistry.java

@@ -91,7 +91,6 @@ public class ListenableFutureCallbackRegistry<T> {
 	 * @param callback the failure callback to add
 	 * @since 4.1
 	 */
-	@SuppressWarnings("unchecked")
 	public void addFailureCallback(FailureCallback callback) {
 		Assert.notNull(callback, "'callback' must not be null");
 		synchronized (this.mutex) {