GetTextTranslationHelper: Make sure we ignore any dotfile or vendor dir

If you are using composer, or ship any other code in dotfile or vendor
directories, we should not parse that for translation.

Signed-off-by: Eric Lippmann <eric.lippmann@icinga.com>

modules/translation/library/Translation/Util/GettextTranslationHelper.php

@@ -467,10 +467,13 @@ class GettextTranslationHelper
 
         $subdirs = array();
         while (($filename = readdir($directoryHandle)) !== false) {
+            if ($filename[0] === '.' || $filename === 'vendor') {
+                continue;
+            }
             $filepath = $directory . DIRECTORY_SEPARATOR . $filename;
             if (preg_match('@^[^\.].+\.(' . implode('|', $this->sourceExtensions) . ')$@', $filename)) {
                 $file->fwrite($filepath . PHP_EOL);
-            } elseif (is_dir($filepath) && !preg_match('@^(\.|\.\.)$@', $filename)) {
+            } elseif (is_dir($filepath)) {
                 $subdirs[] = $filepath;
             }
         }