The alias map in form system extension is a workaround
to enable case insensitive class loading for specific
form classes.

Instead of misusing this technology, introduce an object factory
class which does the mapping within the form extension where it belongs
without affecting the complete system.

By doing so and removing the last alias map (besides the one in compatibility6)
we now have to improve our code for dynamic alias addition since the default
loader is not the alias loader any more but the regular composer class loader.

Releases: master
Resolves: #67969
Change-Id: I3b191b7643c33f311f4ca2b82f7da3c8dfff0f2c
Reviewed-on: http://review.typo3.org/40977


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>