[JIRA] (OVIRT-1579) Install the 'Pipeline GitHub Notify Step' plugin

Install the 'Pipeline GitHub Notify Step' plugin ------------------------------------------------ Key: OVIRT-1579 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1579 Project: oVirt - virtualization made easy Issue Type: New Feature Components: oVirt CI Reporter: Barak Korren Assignee: Evgheni Dereveanchin Priority: High Labels: jenkins, plugin [This plugin|https://plugins.jenkins.io/pipeline-githubnotify-step] is necessary to enable Jenkins to flexibly return status to GitHub. This is a blocker to current work on OVIRT-1522 which is needed to support KubeVirt.