Changes to List Pending Specimens

removed the optional property detail/items/ctx from the response with the 422 status

removed the optional property detail/items/input from the response with the 422 status

added the optional property pending_specimens/items/comment_by_author to the response with the 200 status

added the optional property detail/items/ctx to the response with the 422 status

added the optional property detail/items/input to the response with the 422 status