[JIRA] (OVIRT-1166) Please install Jenkins Pipeline-Milestone-Step-Plugin

Please install Jenkins Pipeline-Milestone-Step-Plugin ----------------------------------------------------- Key: OVIRT-1166 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1166 Project: oVirt - virtualization made easy Issue Type: New Feature Reporter: Nadav Goldin Assignee: infra The 'concurrency' parameter in the 'stage' step in the pipeline-plugin was deprecated, and is replaced by a combination of two new keywords 'lock' and 'milestone', however, the 'milestone' is included in a different plugin. This is required in order to allow gating, for now, in github projects. https://wiki.jenkins-ci.org/display/JENKINS/Pipeline+Milestone+Step+Plugin https://jenkins.io/blog/2016/10/16/stage-lock-milestone/