Made Create() of PipingProfileCreator and PipingSurfaceLineCreator static, because they don't need state. Restructured tests to be non-fluint as requested by review. Related to Issue [WTI-8] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@191 5a3db67b-de53-47b5-99c8-a1c30a6650e2