Sysprep is not supported by default, modify allowed_customization tem…

…plates to check for support first.

app/models/manageiq/providers/cloud_manager/provision_workflow.rb

@@ -60,12 +60,16 @@ def display_name_for_name_description(ci)
     ci.description.blank? ? ci.name : "#{ci.name}: #{ci.description}"
   end
 
+  # Override in provider subclass as needed.
+  #
   def supports_cloud_init?
     true
   end
 
+  # Override in provider subclass as needed.
+  #
   def supports_sysprep?
-    true
+    false
   end
 
   def set_or_default_hardware_field_values(_vm)
@@ -81,7 +85,10 @@ def show_customize_fields(fields, _platform)
   end
 
   def allowed_customization_templates(options = {})
-    allowed_cloud_init_customization_templates(options).concat(allowed_sysprep_customization_templates(options))
+    allowed = []
+    allowed.concat(allowed_cloud_init_customization_templates(options)) if supports_cloud_init?
+    allowed.concat(allowed_sysprep_customization_templates(options)) if supports_sysprep?
+    allowed
   end
 
   private

spec/models/manageiq/providers/cloud_manager/provision_workflow_spec.rb

@@ -47,6 +47,7 @@
     it "should retrieve sysprep templates when cloning" do
       options = {'key' => 'value' }
       allow(sysprep_workflow).to receive(:supports_native_clone?).and_return(true)
+      allow(sysprep_workflow).to receive(:supports_sysprep?).and_return(true)
       allow(sysprep_workflow).to receive(:load_ar_obj).and_return(template)
       allow(template).to receive(:platform).and_return('windows')
 
@@ -229,7 +230,7 @@
 
     context "#supports_sysprep?" do
       it "returns the expected boolean value" do
-        expect(workflow.supports_sysprep?).to eql(true)
+        expect(workflow.supports_sysprep?).to eql(false)
       end
     end
   end