- make getAvailabeInventoryList working

- remove the use of Resource_zGetInventory in many places, replace
  it by calling getInventoryList
- get[*]Inventory now use getInventoryList
- get[*]InventoryStat now use getInventoryList
- getNextNegativeInventoryDate now use getInventoryList


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@14078 20353a03-c40f-0410-a6d1-a30d3c3de9de