[IMP] Uniqueness on product template also#1

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max3903 wants to merge 3 commits intoagyamuta:product_internal_reference_uniquefrom

ursais:product_internal_reference_unique

Commits on Mar 1, 2018

[ADD] Module to add a constraint on the internal reference of the product to make it unique across the database.

agyamuta
authored and
root
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Commits on Mar 2, 2018