Fix crash in fJVT tool
@ademaria reported an issue with the fJVT tool apparently trying to access an aux element with an empty key. It looks like this was due to a mistake in the migration of the tool to R22, where the optional OR decoration key property was assumed to be present, resulting in an error if it wasn't configured by the user.
This MR makes that property correctly optional. A similar variable which is declared in the BDT version of the tool but never actually used is also removed.