Replace category by categories on Template

issue5320
review23791002

tests/scenario_sale_supply_drop_shipment.rst

@@ -101,12 +101,6 @@ Create parties::
     >>> customer = Party(name='Customer')
     >>> customer.save()
 
-Create category::
-
-    >>> ProductCategory = Model.get('product.category')
-    >>> category = ProductCategory(name='Category')
-    >>> category.save()
-
 Create product::
 
     >>> ProductUom = Model.get('product.uom')
@@ -117,7 +111,6 @@ Create product::
     >>> product = Product()
     >>> template = ProductTemplate()
     >>> template.name = 'product'
-    >>> template.category = category
     >>> template.default_uom = unit
     >>> template.type = 'goods'
     >>> template.purchasable = True