Update default configuration for SCryptPasswordEncoder

The recommended minimums for scrypt, as per OWASP Cheat Sheet Series (https://cheatsheetseries.owasp.org/cheatsheets/Password_Storage_Cheat_Sheet.html), are:
Use scrypt with a minimum CPU/memory cost parameter of (2^16), a minimum block size of 8 (1024 bytes), and a parallelization parameter of 1.

Previous default configuration:
cpuCost=16384, memoryCost=8, parallelism=1

New default configuration:
cpuCost=65536, memoryCost=8, parallelism=1

The default salt length was also updated from 64 to 16.

Issue spring-projectsgh-10506

crypto/src/main/java/org/springframework/security/crypto/scrypt/SCryptPasswordEncoder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 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.
@@ -58,6 +58,16 @@
  */
 public class SCryptPasswordEncoder implements PasswordEncoder {
 
+	private static final int DEFAULT_CPU_COST = 65536;
+
+	private static final int DEFAULT_MEMORY_COST = 8;
+
+	private static final int DEFAULT_PARALLELISM = 1;
+
+	private static final int DEFAULT_KEY_LENGTH = 32;
+
+	private static final int DEFAULT_SALT_LENGTH = 16;
+
 	private final Log logger = LogFactory.getLog(getClass());
 
 	private final int cpuCost;
@@ -71,7 +81,7 @@ public class SCryptPasswordEncoder implements PasswordEncoder {
 	private final BytesKeyGenerator saltGenerator;
 
 	public SCryptPasswordEncoder() {
-		this(16384, 8, 1, 32, 64);
+		this(DEFAULT_CPU_COST, DEFAULT_MEMORY_COST, DEFAULT_PARALLELISM, DEFAULT_KEY_LENGTH, DEFAULT_SALT_LENGTH);
 	}
 
 	/**