Added --name flag for credential selection; Added subcommand tests

Signed-off-by: Patrick Eschenbach <patrickeschenbach96@gmail.com>

cmd/harbor/root/config/update.go

@@ -207,6 +207,7 @@ func setNestedValue(obj interface{}, path []string, newValue string, actualSegme
 			fieldValue.SetInt(intVal)
 
 		// If you need to handle other types (e.g. float, slice), add them here.
+
 		default:
 			return fmt.Errorf(
 				"unsupported field type '%s' for field '%s'",