PIM-1607 : export metric family and default unit during attribute export
PIM-1607 : add a metric attribute in footwear catalog and update the
export attribute scenario
PIM-1607 : import metric family and default unit during attribute import
Merge branch 'master' into PIM-1607
Merge pull request #513 from akeneo/PIM-1607

PIM-1607 : import / export  attribute metric family and default unit