This fixes an interesting bug:
  # Takes place during indexing phase, when Transactional Cache is on

  # A transformation is defined, producing a (blue|red) resource from
  # (blue|red) fabric
  transformation = ...

  movement1 = newTempMovement(colour="blue", resource=A)
  movement2 = newTempMovement(colour="red", resource=A)

  amount1 = transformation.getAggregatedAmountList(movement1)[0]
  amount2 = transformation.getAggregatedAmountList(movement2)[0]

  # amount1 and amount2 have wrongly the same Physical path.
  # Which means that due to caching in CategoryTool, the category
  # values will be computed only once instead of twice:
  assert amount1.getVariationText() == "colour/blue" #OK
  assert amount2.getVariationText() == "colour/blue" # !!



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33314 20353a03-c40f-0410-a6d1-a30d3c3de9de