[TASK] Update to class-alias-loader 2.x

Update to latest refactored version of the class-alias-loader.
This might be the last iteration before this package is moved
to TYPO3 namespace.

The alias loader has been refactored, cleaned up, moved to PSR-2.
Documentation and tests have been added.

Releases: master
Resolves: #68811
Change-Id: Ice960936712b39f095d4398ce342947d09b79153
Reviewed-on: http://review.typo3.org/42336


Reviewed-by: Helmut Hummel <helmut.hummel@typo3.org>
Tested-by: Helmut Hummel <helmut.hummel@typo3.org>
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>