Changed the way that the soil profile combobox is filled in piping input by passing the available stochastic soil models and retrieving the profiles based on the set surface line. Removed property SoilProfiles on PipingFailureMechanism. Related to Issue [WTI-418] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@2752 5a3db67b-de53-47b5-99c8-a1c30a6650e2