#358 Ensure lowercase player name, issue cleanup

- Ensure within PasswordSecurity that the player name is lowercase
- Remove check for MD5VB separate salt (we only generate hashes with the salt embedded, so either we need to change that or we don't need this check)
- Remove obsolete TODO

src/test/java/fr/xephi/authme/security/crypts/AbstractEncryptionMethodTest.java

@@ -16,7 +16,6 @@ import static org.junit.Assert.assertTrue;
 /**
  * Test for implementations of {@link EncryptionMethod}.
  */
-// TODO #358: Remove NoSuchAlgorithm try-catch-es when no longer necessary
 public abstract class AbstractEncryptionMethodTest {
 
     /** The username used to query {@link EncryptionMethod#comparePassword}. */