Fix approval tests

[Rune-Christensen]

The approval tests started malfunctioning after changes to the version management setup.

There are a couple of problems:
approvalActualOutput points to the wrong file.
def approvalActualOutput = "approval-test-actual.txt"

the approval tests functions should be dependent on copyJarToBin instead of fatJar.

And approvaltest should be fixed, so at runtime, the scripts used, points to the current version.jar, instead of @Version@