Changes to List canvas objects

added the optional property allOf[subschema #2]/result/objects/items/file_mime_type to the response with the 200 status

added the optional property allOf[subschema #2]/result/objects/items/file_name to the response with the 200 status

added the optional property allOf[subschema #2]/result/objects/items/file_reference to the response with the 200 status

added the optional property allOf[subschema #2]/result/objects/items/file_size to the response with the 200 status

added the optional property allOf[subschema #2]/result/objects/items/file_url to the response with the 200 status

added the optional property allOf[subschema #2]/result/objects/items/image_url to the response with the 200 status

added subschema #9 to the allOf[subschema #2]/result/objects/items/type response property anyOf list for the response status 200