REVIEW [2.9] NX-524: Revert KZ Timeline backport commits

Reverted commits
72105d8d85dd6d061587b38236a1a9550da4dd9b
de80c8d4af1ae5931631273cdbf57a6580b8cbf2
a17f48cc13320bd973deb71d422a1209f861561f
e70c06afee7d6a98a7bb1ec99eebc96f6da5f2db

Original PR
https://github.com/sonatype/nexus-oss/pull/550

Issue
https://issues.sonatype.org/browse/NX-524

CI
http://bamboo.s/browse/NX-OSSF123