Add PxeServer.verify_depot_settings_queue

ManageIQ/manageiq-api#926

app/models/mixins/file_depot_mixin.rb

@@ -19,11 +19,28 @@ module ClassMethods
     def verify_depot_settings(settings)
       return true unless MiqEnvironment::Command.is_appliance?
 
+      settings["password"] ||= find(settings["id"]).authentication_password if settings["id"]
       res = mnt_instance(settings).verify
       raise _("Connection Settings validation failed with error: %{error}") % {:error => res.last} unless res.first
       res
     end
 
+    def verify_depot_settings_queue(userid, zone, options)
+      task_opts = {
+        :action => "Verify #{display_name} Credentials",
+        :userid => userid
+      }
+
+      queue_opts = {
+        :class_name  => name,
+        :method_name => "verify_depot_settings",
+        :args        => [options],
+        :zone        => zone
+      }
+
+      MiqTask.generic_action_with_callback(task_opts, queue_opts)
+    end
+
     def mnt_instance(settings)
       settings[:uri_prefix] ||= get_uri_prefix(settings[:uri])
       klass = "Miq#{settings[:uri_prefix].capitalize}Session".constantize