Changes to List admissions

added the non-success response with the status 412

for the path request parameter eventId, the maxLength was set to 128

for the query request parameter cursor, the maxLength was set to 768

for the query request parameter query, the maxLength was set to 120

for the query request parameter sectionId, the maxLength was set to 128

added the optional property admissions/items/price/override to the response with the 200 status