Implemented parsing of calculation element for height structures, fixed tests and added tests. Related to Issue [WTI-1162]git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@9043 5a3db67b-de53-47b5-99c8-a1c30a6650e2Former-commit-id: e16be582770c247f04e95357800d833eeb16050bFormer-commit-id: b387172ee52037b0fb18c08f48b575236d218e7a