change some steps names. Add a new test to check that updateMovement return nothing but modify directly the movement that need it.
Add a check (CheckPaysheetLineAmounts) in test_basicPaySheetCalculation to be sure that even if updateAggregatedAmountList return nothing, movement are not modified


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27328 20353a03-c40f-0410-a6d1-a30d3c3de9de