Create doc-exports metadata generator script

- add script to generate metadata file for doc-exports repository
- fix metadata issues which became visible with that script

otc_metadata/data/services.yaml

@@ -7,7 +7,7 @@ documents:
   - html_location: docs/antiddos/api-ref
     pdf_name: antiddos-api-ref
     rst_location: api-ref/source
-    service_ype: antiddos
+    service_type: antiddos
     title: API Reference
   - html_location: docs/cbr/umn
     pdf_name: cbr-umn
@@ -75,13 +75,15 @@ documents:
     service_type: eip
     title: API Reference
   - html_location: docs/elb/umn
+    pdf_name: elb-umn
     rst_location: umn/source
     service_type: elb
     title: User Guide
   - html_location: docs/elb/api-ref
+    pdf_name: elb-api-ref
     rst_location: api-ref/source
     title: API Reference
-    type: api-ref
+    service_type: elb
   - html_location: docs/ed/umn
     pdf_name: edb-umn
     rst_location: umn/source
@@ -212,7 +214,7 @@ documents:
     pdf_name: obs-dev-guide
     rst_location: dev_guide/source
     title: Developer Guide
-    type: tool-guide
+    service_type: obs
   - html_location: docs/plas/umn
     pdf_name: plas-umn
     rst_location: umn/source
@@ -569,6 +571,9 @@ service_categories:
   - name: compute
   - name: container
   - name: database
+  - name: network
+  - name: md
+  - name: security
 services:
   - repositories:
       - repo: docs/application-operations-management
@@ -773,7 +778,7 @@ services:
     service_category: md
     service_title: Tag Management Service
     service_type: tms
-  - repository:
+  - repositories:
       - environment: internal
         repo: docs/content-delivery-network
         type: gitea
@@ -865,7 +870,7 @@ services:
     service_category: security
     service_title: Anti DDoS
     service_type: antiddos
-  - repositores:
+  - repositories:
       - environment: internal
         repo: docs/key-management-service
         type: gitea