correct read and write parameters order on set_permissions

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