Fix PHPCS and PMD
Introduced a product value key generator
Merge pull request #1264 from akeneo/pim-2755

Introduced a product value key generator
Update CONTRIBUTING.md
PIM-2869 : fix serialize issue in channel grid
Update CONTRIBUTING.md
Update CONTRIBUTING.md
Update CONTRIBUTING.md
Update CONTRIBUTING.md
Fix PHPCS
Fix PMD
Merge branch 'master' of github.com:akeneo/pim-community-dev
Fixed mass edit attributes scenario
PIM-2854: Allow OrmSelector to be used in all ORM grids
PIM-2854: Clean DatasourceSupportResolver