Add RiverLevelHigh and RiverLevelLow to DamKernelInput, because dependent on the type of analysis the source for these values can vary (e.g. designScenario.RiverLevel or Location.BoezemLevelHbp for RiverLevelHigh)Related to Issue [MWDAM-1095]
Added DamFailureMechanismeCalculationSpecification to KernelInput as this comes from the xml and should not be set in the results themselves. Also added tests for Stability outward.Related to Issue [MWDAM-1057]