PIM-1983 : reduce number of calls to getValues in getExistingValues
PIM-1983 : remove useless array_unique in getExpectedAttributes
PIM-1983 : experiment on indexes of values for a product
PIM-1983 : rollback product model change (values indexes) and refactor
getExistingValues and getExpectedValues to improve perfs of
addMissingValues
PIM-1983 : refactor getExistingValues, no need to pass attributes, we
want all existing values
Merge branch 'master' into PIM-1983-product-builder
PIM-1983 : fix getExpectedAttributes method (index of attributes that
come from product)
PIM-1983: fix get*Rows methods
Merge branch 'master' into PIM-1983-product-builder
Merge pull request #734 from akeneo/PIM-1983-product-builder

PIM-1983 : improve perfs of ProductBuilder