PIM-3101 : fix the issue with the filter values
PIM-3101 : move metric context from product valu normalizer to
normalizer
PIM-3101 : add a CSV product export scenario with heterogeneous data
PIM-3101 : update the metric field context in the flat product value normalizer spec
PIM-3101 : fix the multi-filter case in flat product normalizer
PIM-3101 : update the changelog
PIM-3101 : use context to filter values
Merge branch 'master' into PIM-3101-filter-values

Conflicts:
	CHANGELOG.md
Merge pull request #1393 from akeneo/PIM-3101-filter-values

PIM-3101 issue with CSV product export and filtered values