Add MDExpectedException as a parent class for MDAccessDeniedException,

make it expected

MDErrorReporter.php

@@ -38,6 +38,7 @@ final public static function categorizeError(Throwable $exception):int {
             || $exception instanceof MDPageNotInAggregatedException
             || $exception instanceof MDWrongFileType
             || $exception instanceof MDTooManyFilesUploadException
+            || $exception instanceof MDExpectedException
             || $exception instanceof MDMysqliExpectedError
         ) {
             return self::MD_ERROR_KNOWN;