Description of problem:

When creating a deployment for RHEV + OSE, the OpenShift > Configuration tab shows "undefined" for the domain name:

Set subdomain name for a wildcard entry to point to the OpenShift router.
* Subdomain      *.<entry field>.undefined


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

QCI-1.2-RHEL-7-20160513.t.0

How reproducible:

100%

Steps to Reproduce:
1.) Create new RHEV + OSE deployment.
2.) See "undefined" used as domain name on OpenShift > Configuration tab.

Actual results:

OpenShift router domain name ends in "undefined".

Expected results:

Correct domain name used.

Additional info:

Foreman logs show NoMethError: undefined method `hosts_count' for #<Domain:XXXX>":

==> /var/log/foreman/production.log <==
2016-05-16 14:54:58 [app] [I] Processing by Api::V21::HostgroupsController#index as JSON
2016-05-16 14:54:58 [app] [I]   Parameters: {"apiv"=>"v21"}
2016-05-16 14:54:58 [app] [W] Action failed
 | NoMethodError: undefined method `hosts_count' for #<Domain:0x00000010110c28>
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activemodel-4.1.5/lib/active_model/attribute_methods.rb:435:in `method_missing'
 | /opt/rh/rh-ror41/root/usr/share/gems/gems/activerecord-4.1.5/lib/active_record/attribute_methods.rb:208:in `method_missing'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/active_model_serializers-0.9.3/lib/active_model/serializer.rb:88:in `block (2 levels) in attributes'
 | /opt/theforeman/tfm/root/usr/share/gems/gems/active_model_serializers-0.9.3/lib/active_model/serializer.rb:160:in `block in attributes'