AutoUpgradeTester/UpgradeTestBackendQemu.py:
- move Virtio from NonInteractive to KVM section
- fix bug in SwapImage config
- honor "NonInteractive/BaseMetaPkgs"
- better description what went wrong in the asserts
AutoUpgradeTester/auto-install-tester.py:
- better progress reporting
AutoUpgradeTester/profile/server/DistUpgrade.cfg:
- re-add RealReboot (needed in kvm)