Added UpdateInfos for the StabilityPointStructuresPlugin: - Cleaned up test file (removed accidentally nested class) - Added verification on whether the user wants to proceed with updating or importing -- Added corresponding tests in the Update and Import info tests Related to Issue [WTI-1184] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@10079 5a3db67b-de53-47b5-99c8-a1c30a6650e2