Support for application parameters in fixtures

[dvc]

for example:

# app/config/parameters.yml
parameters:
   base_path: web/files

#.../DataFixtures/data.yml
model: Me\MyBundle\Entity\File
fixtures:
  file1:
    src: %base_path%/1.jpg

SELECT * from File
id, src
1, web/files/1.jpg

It could helps for deploy and testing.

[khepin]

Could be good indeed. You're welcome to send a PR for it ;)

[luishdez]

+1 This will be awesome