sylius_product_variant table data update

According to this error

Twig_Error_Runtime: "An exception has been thrown during the rendering of a template ("Could not convert database value "" to Doctrine Type array") in "LVPWebBundle:Frontend/Product:_singleBox.html.twig"

sylius_product_variant table should be updated to fill the missing pricing_calculator and pricing_configuration datas.

This SQL update solve this migration problem
Merge pull request #1423 from psyray/patch-1

sylius_product_variant table data update