Feat/retire kvm admin

[danistrebel]

Description

What's changed, or what was fixed?

• Retired the KVM admin API as it is fully supported in the Apigee API for a while (see docs env or org)
• Bumped mvn plugin versions for Apigee Sackmesser

Housekeeping

(please check all that apply [x], do not edit the text)

• [x] I have run all the tests locally and they all pass.
• [x] I have followed the relevant style guide for my changes.

Full Repo Validation Required

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• [ ] PR requires full pipeline run (Run for changes only by default).

CC: @apigee-devrel-reviewers

[danistrebel]

/gcbrun

[apigee-devrel-bot]

Pipeline Report

Pipeline	Result	Elapsed Wall Time
[N/A] references/kvm-admin-api	pass	0s
tools/apigee-sackmesser	pass	286s
TOTAL PIPELINE	pass	286s

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Commit version: fa144da