Create CloneableObservable and CloneableObservableList for calculation data that is both Observable and ICloneable. Implemented these classes in all relevant places and extended tests for CoreCloneAssert and the new classes. Related to Issue [WTI-1371] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@12001 5a3db67b-de53-47b5-99c8-a1c30a6650e2