Fix broken i/o redirection

* An i/o redirection is broken (one superfluous whitespace) which leads
  to a syntax error when running the "imaginator" script:


        dest@think:~$ bin/imaginator 
        bin/imaginator: line 53: syntax error near unexpected token `&'
        bin/imaginator: line 53: `        service dnsmasq stop 1> /dev/null 2> &1'