TileSimEventAthenaPool: Fix for finding out-of-repository test reference files.

Allow tests to find reference files outside of the repository.

TileCalorimeter/TileSvc/TileSimEventAthenaPool/CMakeLists.txt

@@ -32,7 +32,10 @@ endif()
 find_package( AthenaPoolUtilitiesTest )
 
 if( ATHENAPOOLUTILITIESTEST_FOUND )
-  run_tpcnv_test( TileSimEventTPCnv_HITS    HITS.04919495._000416 )
+  set( TILESIMEVENTATHENAPOOL_REFERENCE_TAG
+       TileSimEventAthenaPoolReference-01-00-00 )
+  run_tpcnv_test( TileSimEventTPCnv_HITS    HITS.04919495._000416
+                  REFERENCE_TAG ${TILESIMEVENTATHENAPOOL_REFERENCE_TAG} )
 else()
    message( WARNING "Couldn't find AthenaPoolUtilitiesTest. No test(s) set up." )
 endif()