Add 'networks' quota in quota sample files

'networks' quota can be available based on config value.
api-ref should show that for quota-set APIs and also sample files
so that it can be tested somewhere.

Also adding it to quota class APIs sample files also.
Closes-Bug: #1702201

Change-Id: I84d562a8ca10826dea4675d74669b5de64ff0ed0

api-ref/source/os-quota-sets.inc

@@ -51,6 +51,7 @@ Response
   - security_groups: security_groups_quota
   - server_groups: server_groups
   - server_group_members: server_group_members
+  - networks: networks_quota_set_optional
 
 **Example Show A Quota: JSON response**
 
@@ -99,6 +100,7 @@ Request
   - security_groups: security_groups_quota_optional
   - server_groups: server_groups_quota_optional
   - server_group_members: server_group_members_quota_optional
+  - networks: networks_quota_set_optional
 
 **Example Update Quotas: JSON request**
 
@@ -130,6 +132,7 @@ Response
   - security_groups: security_groups_quota
   - server_groups: server_groups
   - server_group_members: server_group_members
+  - networks: networks_quota_set_optional
 
 **Example Update Quotas: JSON response**
 
@@ -203,6 +206,7 @@ Response
   - security_groups: security_groups_quota
   - server_groups: server_groups
   - server_group_members: server_group_members
+  - networks: networks_quota_set_optional
 
 **Example List Default Quotas For Tenant: JSON response**
 
@@ -254,6 +258,7 @@ Response
   - security_groups: security_groups_quota_details
   - server_groups: server_groups_quota_details
   - server_group_members: server_group_members_quota_details
+  - networks: networks_quota_set_optional
 
 **Example Show A Quota: JSON response**
 

api-ref/source/parameters.yaml

@@ -3807,12 +3807,15 @@ networks:
   in: body
   required: true
   type: object
-networks_quota_optional:
+networks_quota_optional: &networks_quota_optional
   description: |
     The number of private networks that can be created per project.
   in: body
   required: false
   type: integer
+networks_quota_set_optional:
+  <<: *networks_quota_optional
+  max_version: 2.35
 new_file:
   description: |
     The name of the qcow2 file that Block Storage creates, which becomes the active