Deprecate ObjectUtils.hashCode for primitives in favor of JDK 8's hashCode methods

Issue: SPR-15395

spring-web/src/main/java/org/springframework/http/HttpRange.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -321,7 +321,7 @@ public abstract class HttpRange {
 
 		@Override
 		public int hashCode() {
-			return ObjectUtils.hashCode(this.suffixLength);
+			return Long.hashCode(this.suffixLength);
 		}
 
 		@Override