NX-126: migrate use of Plexus component descriptor API to Sisu API
Merge pull request #328 from sonatype/NX-126-more-plexus-cleanup

REVIEW: migrate use of Plexus component descriptor API to Sisu API
Fixing since tags.

Some of them were backported.
Some of them originates from security 2.8, when
the project was on it's own repository. Using
already used designation for those, prepending
project name to version to avoid clash.

Note: Security was at version 2.8 when it got
squashed into Nexus OSS repository. Today,
Nexus is at version 2.8, but we had leftovers
of some security components having no designation
and hence, leading to confusion.
NEXUS-6220: Adjust since tags
Merge remote-tracking branch 'origin/master' into NEXUS-6232-concurrent-createrepo
NEXUS-6232: Adjust mocks in UTs

As created mocks lacked some responses.