Changes to Listar Subscriptions

for the query request parameter page_size, default value was changed from 50 to 50

for the query request parameter page_size, the exclusiveMinimum was set to 0.00

for the query request parameter page_size, the max was set to 100.00

api tag Subscriptions added

added the new optional header request parameter x-account-key

added the new optional header request parameter x-api-version

added the media type application/json for the response with the status 422

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 404

added the non-success response with the status 429