switch printout for parallel_warn

Co-authored-by: Lenz Fiedler <[email protected]>

mala/descriptors/descriptor.py

@@ -526,7 +526,7 @@ def _setup_lammps(self, nx, ny, nz, outdir, lammps_dict,
         """
         from lammps import lammps
 
-        printout("Warning: do not initialize more than one pre-processing calculation\
+        parallel_warn("Do not initialize more than one pre-processing calculation\
 in the same directory at the same time. Data may be over-written.")
 
         if self.parameters._configuration["mpi"] and \