PIM-2795: Create factory spec for job
PIM-2795: Create job instance factory
PIM-2795: Define factory as service
PIM-2795: Load factory.yml file
PIM-2795: Update CHANGELOG.md
PIM-2795: Remove useless line
PIM-2795: Take in account job instance have to take some parameters
PIM-2795: Use batch job instance on spec
Merge pull request #1181 from akeneo/PIM-2795

PIM-2795: Create factory for job instance