Merge pull request mitreid-connect#1259 from sbke/patch-1

Adjustment to generate longer codes

Author: jricher

openid-connect-server/src/main/java/org/mitre/oauth2/service/impl/DefaultOAuth2AuthorizationCodeService.java

@@ -57,7 +57,7 @@ public class DefaultOAuth2AuthorizationCodeService implements AuthorizationCodeS
 
 	private int authCodeExpirationSeconds = 60 * 5; // expire in 5 minutes by default
 
-	private RandomValueStringGenerator generator = new RandomValueStringGenerator();
+	private RandomValueStringGenerator generator = new RandomValueStringGenerator(22);
 
 	/**
 	 * Generate a random authorization code and create an AuthorizationCodeEntity,