Merge pull request #15334 from tinaafitz/orchestration_stack_add_zone

Add orchestration stack my_zone.
(cherry picked from commit 8e6d2fb)

https://bugzilla.redhat.com/show_bug.cgi?id=1465415

app/models/orchestration_stack.rb

@@ -86,6 +86,10 @@ def raw_update_stack(_template, _options = {})
     raise NotImplementedError, _("raw_update_stack must be implemented in a subclass")
   end
 
+  def my_zone
+    ext_management_system.try(:my_zone)
+  end
+
   def update_stack(template, options = {})
     raw_update_stack(template, options)
   end

spec/models/service_orchestration_spec.rb

@@ -55,6 +55,17 @@
     end
   end
 
+  describe "#my_zone" do
+    it "takes the zone from ext_management_system" do
+      deployed_stack.ext_management_system = manager_by_setter
+      expect(deployed_stack.my_zone).to eq(manager_by_setter.my_zone)
+    end
+
+    it "returns nil if ext_management_system is not valid" do
+      expect(deployed_stack.my_zone).to eq(nil)
+    end
+  end
+
   describe "#stack_options" do
     before do
       allow_any_instance_of(ManageIQ::Providers::Amazon::CloudManager::OrchestrationServiceOptionConverter).to(