Implemented importer of StructuresCalculation<HeightStructure> configurations. Added IVariationCoefficientDistributionExtensions for setting parameters of IVariationCoefficientDistribution from configurations. Related to Issue [WTI-1163] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@9065 5a3db67b-de53-47b5-99c8-a1c30a6650e2