[BUGFIX] ContentAdapter for FAL not capable of translations

The ContentAdapter, which rewrites FAL references to old
style database formats, is not capable of dealing with
relations - images and files so to speak - to translated
tt_content record.

IRRE Records always are related to the UID of the actual
translated record - not to the uid of tt_content record.

As in TSFE and/or CSS Styled Content Rendering the UID of
translated records is stored within the property
_LOCALIZED_UID this is what the ContentAdapater has to
hand over.

Change-Id: I5887511bcf1dd8fb481e45762e302e0908791bdd
Fixes: #40609
Releases: 6.0
Reviewed-on: http://review.typo3.org/14337
Reviewed-by: Steffen Ritter
Tested-by: Steffen Ritter