Simplify and fix range filtering for server data. We did not use the user id in the user range and the ld_* values are provided as parameters for the datacage no need of that artifact database access. This also fixes Location awareness for DGMs

select.abflusstafel = \
    SELECT ABFLUSSTAFEL_NR, \
           ABFLUSSTAFEL_BEZ, \
           GUELTIG_VON, \
           GUELTIG_BIS, \
           PEGELNULLPUNKT, \
           AT.BFG_ID \
    FROM ABFLUSSTAFEL AT \
    WHERE MESSSTELLE_NR LIKE :number