Changes to List collections

api operation id getCollection removed and replaced with listCollections

removed the optional property collection_type from the response with the 200 status

removed the optional property description from the response with the 200 status

removed the optional property modified from the response with the 200 status

removed the optional property name from the response with the 200 status

removed the optional property subject from the response with the 200 status

removed the optional property topic from the response with the 200 status

added the required property results to the response with the 200 status