Foreman » Smart Proxy

The commit fixes dhcp server virsh.rb provider. Upon loading the
contents of the libvirt network XML and parsing for DHCP reservations a
check is performed on the kind of records that are being loaded. The
dhcp_api.rb 'delete' helper tries to load network entries of the
'reservation' kind, the helper uses modules/dhcp/dhcp/subnet.rb to
validate on that and filter out entries.

In contrary to other providers (ms, isc) the loadSubnetData method of
virsh.rb was dealing out "Proxy::DHCP::Record" for any entry it was able
to discover, but should have been instantiating
"Proxy::DHCP::Reservation" to pass the validation.

This resulted in "ERROR -- : Record
x.x.x.x/xx:xx:xx:xx:xx:xx not found" as well as leaves in the libvirt
network XML. This prevented the creation of VMs with the same addresses,
since leftover DHCP entries conflicted with the new ones.

https://github.com/theforeman/smart-proxy/pull/164