PIM-2316 : add enabled filter
PIM-2316 : define the new filter service
PIM-2316 : update the datagrid configuration to use the new filter
PIM-2316 : add enabled filter spec, add missing method in FilterDatasourceAdapterInterface
Merge branch 'master' into mongo/filter_enabled
Merge pull request #938 from akeneo/mongo/filter_enabled

Enabled filer (MongoDB support)