Required attributes in the product family and in the product

[irybachok]

1. Go to the http://treopim-install.zinit1.com/#ProductFamily/ page
2. Add a new attribute (via +) and set the checkbox "Is required" - https://screen.treotest.com/i.rybachok/2019-11-14_11-40-13.jpg
3. Go to the product which belongs to a product family.
   Actual result: On the product page, the attribute is displayed as not required, as on the product family page. When adding a required attribute after the product creation: https://screen.treotest.com/i.rybachok/2019-11-14_11-42-20.jpg
   Expected result: If the attribute is required in the product family, it is required also in a product.