Renamed extension classes for interfaces to remove the prefix I Related to Issue [WTI-1328]git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@10777 5a3db67b-de53-47b5-99c8-a1c30a6650e2Former-commit-id: 87959e51bb1c1a308c9cac0a59092c37ed12f43fFormer-commit-id: de9a8b123d074ac34bcb04b12cb82e0bd2cb1fbe