NEXUS-5828: Fixing upgrade steps

Upgrade203to204 was setting wrong model version ("current" instead of 2.0.4)
Upgrade204to205 was not setting model version, and actual change made
optional, as it seems tests never set this value, but perform content
comparison on resulting file.
NEXUS-5828: Updating resources

Attached default configuration version was
wrong, was not having proper version.

Same for some UT resources used during tests.