[ADD] product_customer_code_picking module v.7.0

Moving the MP: https://code.launchpad.net/~agilebg/stock-logistic-flows/adding_product_customer_code_picking/+merge/202472
I think this field needs storing especially since you then include it in a tree view.  It would seem 'product_id', 'partner_id' on the move are the important fields as well as on the new object.