Introduced Property control for GrassCoverErosionOutwardsFailureMechanism. Added GeneralGrassCoverErosionOutwardsInput for containing the LengthEffect. Pulled out shared resources and put it in Ringtoets.Common.Data. Related to Issue [WTI-746] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@4966 5a3db67b-de53-47b5-99c8-a1c30a6650e2