[BUGFIX] Ignore autoload-dev if provided in composer.json

Resolves: #70557
Releases: master
Change-Id: Ie1a7f7fb1e9de48e6e0d65ddf2be398d65101ddc
Reviewed-on: http://review.typo3.org/43954


Reviewed-by: Sascha Egerer <sascha@sascha-egerer.de>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>