Hypervisor type on provisioning of ISO images: No option to pass this parameter via fog?

Hi everybody.

Wile I added support of provisioning to cloudstack
(https://github.com/bytemine/foreman_cpp_cloudstack) not only from a
template but also from an ISO I have to transmit the hypervisor type to
cloudstack. But to my surprise fog does not support handing over the
hypervisor type, or did I miss anything? Any help is really appreciated!
Prerequisites: Foreman 1.7, 1.8 is not supported at the moment by the

Bye, Daniel