correct read and write parameters order on set_permissions and list_perm...

...issions, read-write perms were in bad order
According to rabbitmqctl manual:
set_permissions [-p vhostpath] {user} {conf} {write} {read}

    vhostpath

        The name of the virtual host to which to grant the user access, defaulting to /.
    user

        The name of the user to grant access to the specified virtual host.
    conf

        A regular expression matching resource names for which the user is granted configure permissions.
    write

        A regular expression matching resource names for which the user is granted write permissions.
    read