Suppress Import/Export function warnings. Add comment for confirmation.

lib/gitlab/import_export/import_export.yml

@@ -39,7 +39,7 @@ project_tree:
       - :author
       - :events
     - :statuses
-  - :triggers
+  - :triggers # TODO: Need to confirm
   - :deploy_keys
   - :services
   - :hooks

spec/lib/gitlab/import_export/all_models.yml

@@ -99,6 +99,7 @@ triggers:
 - project
 - trigger_requests
 - owner
+- trigger_schedule
 deploy_keys:
 - user
 - deploy_keys_projects
@@ -194,6 +195,7 @@ project:
 - runners
 - variables
 - triggers
+- trigger_schedules
 - environments
 - deployments
 - project_feature

spec/lib/gitlab/import_export/safe_model_attributes.yml

@@ -240,6 +240,16 @@ Ci::Trigger:
 - updated_at
 - owner_id
 - description
+- ref
+Ci::TriggerSchedule:
+- id
+- project_id
+- trigger_id
+- deleted_at
+- created_at
+- updated_at
+- cron
+- next_run_at
 DeployKey:
 - id
 - user_id