Merge pull request andersundsehr#114 from mogic-le/mimetypefix

[BUGFIX] Make sure mime type is available when no property is specified

Classes/Driver/AmazonS3Driver.php

@@ -285,7 +285,7 @@ public function getRootLevelFolder()
      */
     public function getFileInfoByIdentifier($fileIdentifier, array $propertiesToExtract = [])
     {
-        if (in_array('mimetype', $propertiesToExtract)) {
+        if (count($propertiesToExtract) === 0 || in_array('mimetype', $propertiesToExtract)) {
             // force to reload the infos from S3 if the mime type was requested
             $this->flushMetaInfoCache($fileIdentifier);
         }