Remove useless fields from artifact information.

[soffokl]

A lot of properties in artifacts info is not used. Some of them just duplicates each other.
We need to make list of properties simple and effective.

{
    "architecture": "AMD64",
    "configContents": "",
    "id": "public.5d72cdcaa2092e4ff013a0eb06039291",
    "md5Sum": "5d72cdcaa2092e4ff013a0eb06039291",
    "name": "hadoop",
    "ownerFprint": "public",
    "package": "",
    "packagesContents": "",
    "parent": "openjre7",
    "size": 46300982,
    "version": "4.0.0",
    "owner": ["public"]
}