Suppress warning about CRDs being beta

[jglick]

If you are using custom resources, there is nothing you can do about the fact that this system is still officially in beta so it is just annoying to get a warning about it in every JVM session. This is particularly noxious in the case of Jenkins X serverless builds which print a message like

  18.333 [id=39]	WARNING	i.f.k.c.i.VersionUsageUtils#alert: The client is using resource type 'customresourcedefinitions' with unstable version 'v1beta1'

near the start of every build, as the jx-resources plugin (which uses kubernetes-client via jx-java-client) is initialized and begins updating a PipelineActivity CR.

[centos-ci]

Can one of the admins verify this patch?

[rohanKanojia]

ok to test

[rohanKanojia]

[merge]