Use Container::call() when running artisan command fire() method.

Signed-off-by: crynobone <crynobone@gmail.com>
Accomodate multiple composer autoloaded folders
Merge pull request #6350 from crynobone/feature/artisan-call

[5.0] Use Container::call() when running artisan command fire() method.
Merge pull request #6249 from Weeblewonder/patch-1

[5.0] Accomodate Multiple Autoloaded Folders