Updated error messages presented to the user. Made CouldNotConnectException and Storage/StorageValidationException inherit Storage exception. Removed [Random] attribute for test parameters and replaced with random values or test cases (whatever was more applicable) Related to Issue [WTI-487] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@4220 5a3db67b-de53-47b5-99c8-a1c30a6650e2