spliting metadata

Reviewed-by: gtema <artem.goncharov@gmail.com>
Co-authored-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-committed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>

otc_metadata/data/documents/cse-api-ref.yaml

@@ -0,0 +1,9 @@
+---
+environment: internal
+html_location: docs/cse/api-ref
+link: /cloud-service-engine/api-ref/
+pdf_name: cse-api-ref
+rst_location: api-ref/source
+service_type: cse
+title: API Reference
+type: api-ref