Add GeneratorsServiceProvider to service provider list
Add GeneratorsServiceProvider to service provider list

Laravel-4-Generators needs to be listed in the service providers
array for migrations-generator to work.

Xethron/migrations-generator,tamnil/migrations-generator,cyrrill/migrations-generator,codereverser/migrations-generator,rot26/migrations-generator,alejandromunevar/migrations-generator,jamisonvalenta/migrations-generator,Dmitri10/migrations-generator