- Remove extra connections in the form of `server_number_1` for the same server
  during initialization of servers in the `rpl_init.inc` file.
- Remove disconnecting and reconnecting to the same connections,
  since they are not used by the test.
- Update comments about the above.

- Reviewer: <knielsen@knielsen-hq.org>
            <brandon.nesterenko@mariadb.com>