[BUGFIX] t3lib_div::getAllFilesAndFoldersInPath no md5 for folders

Added md5 hash for folders keys in returned array
in method GeneralUtility::getAllFilesAndFoldersInPath

Change-Id: Ibfaa910c53a4ffac21be791e51aecc9212c40b49
Resloves: #37701
Releases: master
Reviewed-on: http://review.typo3.org/36435


Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>