Description of problem:
After a failed installation of the hosted engine, there are remaining entries in /etc/libvirt/qemu.conf about certs:

/etc/libvirt/qemu.conf:vnc_tls=1
/etc/libvirt/qemu.conf:vnc_tls_x509_cert_dir="/etc/pki/vdsm/libvirt-vnc"

They are not removed by issuing ovirt-hosted-engine-cleanup and inhibit a re-run of the deployment.

Version-Release number of selected component (if applicable):
4.4beta

How reproducible:
always

Steps to Reproduce:
1. run hosted-engine --deploy
2. if it fails, run ovirt-hosted-engine-cleanup
3. tail /etc/libvirt/qemu.conf to see remaining entries
4. run hosted-engine --deploy again and it will fail

Actual results:
re-deployment fails

Expected results:
re-deployment succeeds

Additional info:
Workaround: remove last 4 lines of /etc/libvirt/qemu.conf and re-deploy