[JIRA] (OVIRT-1531) Make pipeline loader run slave-cleanup.sh and global-setup.sh on slaves

Make pipeline loader run slave-cleanup.sh and global-setup.sh on slaves ----------------------------------------------------------------------- Key: OVIRT-1531 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1531 Project: oVirt - virtualization made easy Issue Type: Improvement Components: oVirt CI Reporter: Barak Korren Assignee: Barak Korren Labels: standard-ci Most jobs run '{{slave-cleanup.sh}} and '{{global-setup.sh}}' on slaves before doing anything on them. Pipeline jobs currently do this on slaves on which they run STD-CI scripts but not on slaves that are used for the pipeline's own work. We need to make the pipeline loader run '{{slave-cleanup.sh}} and '{{global-setup.sh}}' on the slave it uses to load the pipeline code so we can be sure these scripts always run on all slaves.