[JIRA] (OVIRT-2382) Refactor global_setup and slave_cleanup to have different setup/cleanup flows for container slaves

Refactor global_setup and slave_cleanup to have different setup/cleanup flows for container slaves -------------------------------------------------------------------------------------------------- Key: OVIRT-2382 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-2382 Project: oVirt - virtualization made easy Issue Type: Task Reporter: Daniel Belenky Assignee: infra Since setup/cleanup in a container can end up being very different than for VM/BM, it's better to have different main functions instead of skipping inside individual configuration functions. So for example, the current main will become main_native and we'll also have main_container while main will just switch between the two.