Implemented systemtest Relax_disp.test_dx_map_clustered to cath the missing creation of a point file.
Bug #22753 (https://gna.org/bugs/index.php?22753): dx.map does not work when only 1 point is used.
Authored by: tlinnet 2014-10-05
Parent: [r26148]
Child: [r26150]
