JBIDE-18848 setup ide-config.properties test (experiment)

This code final resting place is probably *not* inside tests module, but I put it there to just get easily started
and be able to show the code running easily.

This additional test simply iterates all properties in ide-config.properties to do some basic validation.
for now I just added those that are actually present. We can add more or even lookup in jira for exact matches.