cleaned up responseType calls, addresses #451

openid-connect-common/src/main/java/org/mitre/openid/connect/config/ServerConfiguration.java

@@ -57,7 +57,7 @@ public class ServerConfiguration {
         RECOMMENDED. URL of the OP's Dynamic Client Registration Endpoint [OpenID.Registration]. 
     scopes_supported
         RECOMMENDED. JSON array containing a list of the OAuth 2.0 [RFC6749] scope values that this server 
-
+    response_types_supported
         REQUIRED. JSON array containing a list of the OAuth 2.0 response_type values that this server 
         supports. The server MUST support the code, id_token, and the token id_token response type values. 
     grant_types_supported

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

@@ -100,9 +100,8 @@ public class DefaultOIDCTokenService implements OIDCTokenService {
 		}
 		
 		// TODO: this ought to be getResponseType; issue #482
-		String responseType = request.getRequestParameters().get("response_type");
+		Set<String> responseTypes = request.getResponseTypes();
 		
-		Set<String> responseTypes = OAuth2Utils.parseParameterList(responseType);
 		if (responseTypes.contains("token")) {
 			// calculate the token hash
 			Base64URL at_hash = IdTokenHashUtils.getAccessTokenHash(signingAlg, accessToken);