AthenaPoolExampleAlgorithms: Update reference files.

...aPoolExampleAlgorithms/share/AthenaPoolExample_Concat.ref

...enaPoolExampleAlgorithms/share/AthenaPoolExample_Copy.ref

...aPoolExampleAlgorithms/share/AthenaPoolExample_Filter.ref

...PoolExampleAlgorithms/share/AthenaPoolExample_ReWrite.ref

...xampleAlgorithms/share/AthenaPoolExample_ReWriteAgain.ref

...ExampleAlgorithms/share/AthenaPoolExample_ReWriteNext.ref

...naPoolExampleAlgorithms/share/AthenaPoolExample_WMeta.ref

...naPoolExampleAlgorithms/share/AthenaPoolExample_Write.ref