JENKINS-36984 merge request

[Auke Noppe]

Hi,

A while ago I have submitted a pull-request for the consul-kv-builder plugin which adds support for env-vars and I want to have it merged into the repository so we can use an official plugin version in Jenkins.

Please see https://issues.jenkins-ci.org/browse/JENKINS-36984 for more details about this change and a link to the pull-request.

Thanks in advance,

Auke