Fix SimpleKey equality with array argument

Prior to this commit, an array argument was not handled properly in
SimpleKey#equals and SimpleKey#hashCode. As a result, two method
invocations with the same array argument lead to two different keys
and therefore two different entries in the cache.

This commit uses deepEquals and deepHashCode to properly handle
methods that have arguments that are array types.

Issue: SPR-11505

spring-context/src/main/java/org/springframework/cache/interceptor/SimpleKey.java

@@ -50,12 +50,13 @@ public final class SimpleKey implements Serializable {
 
 	@Override
 	public boolean equals(Object obj) {
-		return (this == obj || (obj instanceof SimpleKey && Arrays.equals(this.params, ((SimpleKey) obj).params)));
+		return (this == obj || (obj instanceof SimpleKey
+				&& Arrays.deepEquals(this.params, ((SimpleKey) obj).params)));
 	}
 
 	@Override
 	public int hashCode() {
-		return Arrays.hashCode(this.params);
+		return Arrays.deepHashCode(this.params);
 	}
 
 	@Override