Add Faker provider

[ker0x]

This PR introduce a faker provider using FakePHP. It's main purpose is to provide fake data during tests.

[jbelien]

Hello @ker0x, welcome to the project.
I'm not exactly sure I understand the goal of that new provider, could you give us some use cases ?
Thanks.

[ker0x]

@jbelien yes sure.

In my case, I have a listener on some of my entities that geocodes them each time they are created or updated. During my tests, I perform a lot of operations on these entities, and using a real provider slows down the tests because of HTTP calls. I don't particularly need the geocoded data to be accurate during tests, so having a provider with fake data saves me from making these HTTP calls (and it saves requests with some providers that have free request limits per month).

[Chris53897]

@ker0x Could you please revert the changes to other files beside from your new provider, and rebase against master.
This wil make the ci green.