made saved user auth remember original class if it gets re-used

openid-connect-common/src/main/java/org/mitre/oauth2/model/SavedUserAuthentication.java

@@ -67,8 +67,14 @@ public class SavedUserAuthentication implements Authentication {
 		setName(src.getName());
 		setAuthorities(src.getAuthorities());
 		setAuthenticated(src.isAuthenticated());
+
+		if (src instanceof SavedUserAuthentication) {
+			// if we're copying in a saved auth, carry over the original class name
+			setSourceClass(((SavedUserAuthentication) src).getSourceClass());
+		} else {
 			setSourceClass(src.getClass().getName());
 		}
+	}
 
 	/**
 	 * Create an empty saved auth