Changes to List listings

the items/integrations/items/id response's property type changed from integer to string for status 200

api operation id propertiesListingList was added

added the optional property items/checkInInstructions to the response with the 200 status

the items/cleaning/defaultCleaningTime response's property pattern ^([0-1]?[0-9]|2[0-3]):[0-5][0-9]$ was added for the status 200