systemvmtemplate: Update debian 10 iso to 10.5.0 (#4243)
systemvmtemplate: Update debian 10 iso to 10.5.0 (#4243)

Debian 10.4.0 is not available, therefore SystemVM templates will fail to build with a missing iso.

Fixed updating with the Debian 10.5.0 iso located at https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/
GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack