[BUGFIX] Fix image descriptions for renderMethod = table

Image descriptions are not rendered correctly using
renderMethod = table, since only the description of the
last image is rendered when you have multiple images
in a content object..

This patch loads the current image file reference to the
contentObjectRenderer while looping through all images
in order to output the image descriptions.

Resolves: #68153
Releases: master, 6.2
Change-Id: I273fff90a5ab3a35e6422ca74b6d83b298b9b09d
Reviewed-on: http://review.typo3.org/41396


Reviewed-by: Susanne Moog <typo3@susannemoog.de>
Tested-by: Susanne Moog <typo3@susannemoog.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>