[BUGFIX] Fix "Invalid cache entry identifier"

Hash the parser list by md5 to have a valid identifier.

Resolves: #66403
Releases: master
Change-Id: I78505c77225a67cd85ca634bc0c640c752a3f335
Reviewed-on: http://review.typo3.org/38663


Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>