modify for autoinstall_csman_xs

Modify Packages baseurl to v4.3
Modify SystemVM download command for ACS v4.3 and XenServer
Revert "modify for autoinstall_csman_xs"

This reverts commit e2aecfda16fd9ca9557b142065007e1fbd33a491.
Revert "Revert "modify for autoinstall_csman_xs""

This reverts commit ecd8ee227e0c18405720e0f86c41604d8ade0728.