Improved system stability on very large scale migrations. Improved stability to Migrate for Compute Engine upgrade

## Fix Improved system stability on very large scale migrations. ## Fix Improved stability to Migrate for Compute Engine upgrade. ## Fix Fixed an issue with Edge Node version upgrades. ## Fix Added support for E2 machine types. ## Fix Fixed an issue with non-ASCII entries in Windows OS servicing. ## Fix Stability improvements to Linux OS servicing. ## Fix Fixed an issue with Migrate for Compute Engine Backend volume mounting affecting VMs originally created prior to VSphere 5.0 (requires reinstall of the system).