[JIRA] (OVIRT-992) Make mock_runner.sh log create safe

Make mock_runner.sh log create safe ----------------------------------- Key: OVIRT-992 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-992 Project: oVirt - virtualization made easy Issue Type: Bug Components: Jenkins Reporter: Barak Korren Assignee: Barak Korren Priority: Highest Recently (OVIRT-988) we made mick_runner.sh create logs in exported-artifacts to make post-build collection scripts consistent. This can fail when the script running inside mock tries to clean up exported-artifacts on it own. In that case, mock_runner.sh can fail because the directories and files it created are not longer there. We need to move log creation to a safe temporary directory, and move the logs to exported-artifacts only when mock_runner.sh is finished.