Introduce virtualization manager

In order to support kubevirt as a secondary manager of the
openshift/kubevirt provider, a new mixin is added to represent that
capability.

app/models/manageiq/providers/container_manager.rb

@@ -5,6 +5,7 @@ class ContainerManager < BaseManager
 
     include AvailabilityMixin
     include HasMonitoringManagerMixin
+    include HasVirtualizationManagerMixin
     include SupportsFeatureMixin
 
     has_many :container_nodes, -> { active }, :foreign_key => :ems_id
@@ -46,9 +47,17 @@ class ContainerManager < BaseManager
     has_many :all_container_images, :foreign_key => :ems_id, :dependent => :destroy, :class_name => "ContainerImage"
     has_many :all_container_nodes, :foreign_key => :ems_id, :dependent => :destroy, :class_name => "ContainerNode"
 
+    has_one :virtualization_manager,
+            :foreign_key => :parent_ems_id,
+            :class_name  => "ManageIQ::Providers::Kubevirt::InfraManager",
+            :autosave    => true,
+            :dependent   => :destroy
 
     virtual_column :port_show, :type => :string
 
+    before_create :ensure_virtualization_manager
+    before_update :ensure_virtualization_manager_properties
+
     supports :external_logging do
       unless respond_to?(:external_logging_route_name)
         unsupported_reason_add(:external_logging, _('This provider type does not support external_logging'))

app/models/mixins/has_virtualization_manager_mixin.rb

@@ -0,0 +1,21 @@
+module HasVirtualizationManagerMixin
+  extend ActiveSupport::Concern
+
+  private
+
+  def ensure_virtualization_manager
+    # virtualization_manager should be defined by child classes.
+    if try(:virtualization_manager_needed?)
+      build_virtualization_manager(:parent_manager => self)
+      virtualization_manager.name = "#{name} Virtualization Manager"
+    end
+    ensure_virtualization_manager_properties
+  end
+
+  def ensure_virtualization_manager_properties
+    if virtualization_manager
+      virtualization_manager.zone_id = zone_id
+      virtualization_manager.provider_region = provider_region
+    end
+  end
+end