[REF] changes suggested by @guewen

Set a keyword argument on the context to better respect the convention.
Allow the context to contain iterable types supported by the ORM.

Cherry-picked from v7 at 9ab7f78a7f

Conflicts:
	stock_available/product.py
	stock_available_immediately/product.py

__unported__/stock_available_mrp/product.py

@@ -73,10 +73,12 @@ class product_product(orm.Model):
         return res
 
     def _compute_potential_qty_from_bom(self, cr, uid, bom_id, to_uom,
-                                        context):
+                                        context=None):
         """Compute the potential qty from BoMs with components available"""
         bom_obj = self.pool['mrp.bom']
         uom_obj = self.pool['product.uom']
+        if context is None:
+            context = {}
         if 'uom' in context:
             context_wo_uom = context.copy()
             del context_wo_uom['uom']

__unported__/stock_available_sale/product.py

@@ -134,7 +134,7 @@ class ProductProduct(orm.Model):
         # location
         if context.get('location', False):
             # Either a single or multiple locations can be in the context
-            if not isinstance(context['location'], list):
+            if isinstance(context['location'], (int, long)):
                 location_ids = [context['location']]
             else:
                 location_ids = context['location']