Koan runs extremely slowly since 2.4

[jmaas]

Since switching from libvirt-python to virsh in koan 2.4, koan is completely unusable on Centos 6.x. There are no errors or logs that indicate any obvious errors that I can find. The OS installer (also Centos 6) does run, just extremely slowly. Where an install took 5 minutes with koan 2.2, 2.4 and 2.6 take 12+ hours. I have only tested this with KVM and Centos 6x hosts/guests.

Copied from cobbler/#953

[akettmann]

I would check if your VMs are getting created as QEMU instead of KVM. I opened a bugzilla bug regarding that with Spacewalk 2.3 sending the virt-install command as "--virt-type qemu" which is getting interpreted as literal QEMU despite the --hvm flag being used. The bug is https://bugzilla.redhat.com/show_bug.cgi?id=1253464