[JIRA] (OVIRT-1842) Ensure mock is insalled and up-to-date from global_setup,sh

Ensure mock is insalled and up-to-date from global_setup,sh ----------------------------------------------------------- Key: OVIRT-1842 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1842 Project: oVirt - virtualization made easy Issue Type: Outage Components: Jenkins Slaves, mock_runner Reporter: Barak Korren Assignee: Barak Korren `{{mock}}` is probably the most important package for CI at this point. This makes `{{global_setup.sh}}` ensure its installed and up to date. Another benefit to this is that newer mock versions will be tested automatically when newer repo snapshots are configured for slaves.