Merge pull request #14161 from Ladas/placeholder_availability_zones_f…

…or_openstack_infra

We need a placeholder availability_zones method for network topology
(cherry picked from commit 8f004a3)

https://bugzilla.redhat.com/show_bug.cgi?id=1431163

app/models/manageiq/providers/openstack/infra_manager.rb

@@ -25,12 +25,11 @@ def ensure_network_manager
     build_network_manager(:type => 'ManageIQ::Providers::Openstack::NetworkManager') unless network_manager
   end
 
-  def cloud_tenants
-    CloudTenant.where(:ems_id => provider.try(:cloud_ems).try(:collect, &:id).try(:uniq))
+  # A placeholder relation for NetworkTopology to work
+  def availability_zones
   end
 
-  def availability_zones
-    AvailabilityZone.where(:ems_id => provider.try(:cloud_ems).try(:collect, &:id).try(:uniq))
+  def cloud_tenants
   end
 
   def host_aggregates