FIX: Erreur lors de la migration doctrine

Change-Id: Id2f6a409a2c0a4475bfaf8dd92ce5991e8f54e3e

appli_sf/config/packages/doctrine_migrations.yaml

 doctrine_migrations:
     migrations_paths:
-        'DoctrineMigrations' : 'src/Migrations'
+        'DoctrineMigrations' : '%kernel.project_dir%/src/Migrations'
 
     storage:
         # Default (SQL table) metadata storage configuration