PIM-1528 : Change MetricValue to have base data and unit
PIM-1528 : Add base unit, base value and family for metric entities
PIM-1528: update form type in adequation with entity
PIM-1528: Add family to attribute type
PIM-1528: Add family field
PIM-1528: Add subscriber for metric entity
PIM-1619: Inverse unit and data value for Metric field
PIM-1619: Inverse data and unit fields position
PIM-1528: Clean metric subscriber
Merge branch 'master' into PIM-738
PIM-1528: Update composer.lock for Oro/Platform upgrade
PIM-1528: Fix some issues
Merge pull request #525 from akeneo/PIM-738

PIM-1528 : Change metric data model