Refactoring of PipingDataNodeController due to discussion on MVC - Introduced PipingCalculationService which can be called to perform a piping calculation - Removed PipingDataNodeController obsolete + logic of PipingDataNodeController moved to PipingDataNodePresenter + context menu constructed in PipingDataNodeController - Adapted tests accordingly. Related to Issue [WTI-13] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@211 5a3db67b-de53-47b5-99c8-a1c30a6650e2