Using the ruby sdk I'm unable to start a VM on a specific host.

According to the API docs at api/v4/model#types/vm_placement_policy :

Name Type
----------------
hosts Host[]

No matter what I specify, I run into this same bug: https://bugzilla.redhat.com/show_bug.cgi?id=1249521

    65:           require 'pry'
    66:           binding.pry
    67:
 => 68:           machine.start(
    69:             use_cloud_init: true,
    70:             vm: vm_configuration
    71:           )
    72:
    73:           @app.call(env)
[1] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> vm_configuration[:placement_policy] = { :hosts => [{ :host => 'server.test.local' }], :affinity => 'pinned' }
[2] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> vm_configuration
=> {:initialization=>
  {:host_name=>"test",
   :nic_configurations=>[{:name=>"eth0", :on_boot=>true, :boot_protocol=>"static", :ip=>{:version=>"v4", :address=>"192.168.2.200", :gateway=>"192.168.2.1"}}],
   :custom_script=>
    "write_files:\n  - content: |\n      wat\n    path: /tmp/something.txt\n    permissions: '0644'\nnetwork-interfaces: |\n  auto eth0\n  iface eth0 inet static\n    address 192.168.2.201\n    network 192.168.2.0\n    netmask 255.255.255.0\n    gateway 192.168.2.1\n    dns-nameservers 192.168.2.113 192.168.2.1\n"},
 :placement_policy=>{:hosts=>[{:host=>"server.test.local"}], :affinity=>"pinned"}}
==> default: An error occured. Recovering..
==> default: Halting VM...
==> default: Waiting for VM to shutdown...
==> default: Removing VM...
/home/myoung/.rvm/gems/ruby-2.2.3/gems/ovirt-engine-sdk-4.1.2/lib/ovirtsdk4/service.rb:52:in `raise_error': Fault reason is "Incomplete parameters". Fault detail is "Host [id|name] required for validateAndUpdateHostsInPlacementPolicy". HTTP response code is 400. (OvirtSDK4::Error)

The same goes with giving an object instead of a hash object

=> 68:           machine.start(
   69:             use_cloud_init: true,
   70:             vm: vm_configuration
   71:           )
   72:
   73:           @app.call(env)
[1] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> hosts_service = env[:connection].system_service.hosts_service
[2] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> host = hosts_service.list(search: 'name=server.test.local')[0]
[3] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> host.status
=> "up"
[4] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> vm_configuration[:placement_policy] = { :hosts => [{ :host => host }]}
==> default: An error occured. Recovering..
==> default: Halting VM...
==> default: Waiting for VM to shutdown...
==> default: Removing VM...
/home/myoung/.rvm/gems/ruby-2.2.3/gems/ovirt-engine-sdk-4.1.2/lib/ovirtsdk4/service.rb:52:in `raise_error': Fault reason is "Incomplete parameters". Fault detail is "Host [id|name] required for validateAndUpdateHostsInPlacementPolicy". HTTP response code is 400. (OvirtSDK4::Error)
from /home/myoung/.rvm/gems/ruby-2.2.3/gems/ovirt-engine-sdk-4.1.2/lib/ovirtsdk4/service.rb:85:in `check_action'
from /home/myoung/.rvm/gems/ruby-2.2.3/gems/ovirt-engine-sdk-4.1.2/lib/ovirtsdk4/services.rb:29460:in `start'