Validity check on ShiftedLogNormalDistribution Shift. Shift taken into account upon calculating the design value. Removed rounding of intermediate calculation results. Updated expected values of dependend unit tests. Related to Issue [WTI-688] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@4458 5a3db67b-de53-47b5-99c8-a1c30a6650e2