Maven artifact fingerprints are computed and recorded twice

The artifacts which are produced by a maven job have their artifacts fingerprinted twice. Once in MavenFingerprinter and once in MavenArtifactArchiver . This adds unnecessary overhead to maven jobs.

Proposal: as fingerprints are needed in the MavenArtifact records generated in the MavenArtifactArchiver, it probably doesn't make much sense to remove the fingerprinting from there. Instead, I'd propose to fingerprint all 'used' artifacts in the MavenFingerprinter and all 'produced' artifacts in the MavenArtifactArchiver

*) Note that fingerprints are even generated in MavenArtifactArchiver if automatic artifact archiving is disabled