Fix Broken Validator Version Flag

[alexanderkiel]

If I call the validator with:

java -jar validator.jar -version 4.0.1 -ig ig.pack examples

It tries to detect the FHIR version from the IG name ig.pack but can't. So it uses the default with is null. The earlier detected version is overridden with null. The validator crashes.

If I however call it like this:

java -jar validator.jar -ig ig.pack -version 4.0.1 examples

The version is taken from the version flag because it comes after the detection from the IG flag.