openshift_facts.rb: sort cart_list

So instead of the following:

    [root@broker ~]# mco facts cart_list
    Report for fact: cart_list
    
            cron-1.4|ruby-1.9|ruby-1.8|python-2.6|mysql-5.1|diy-0.1|postgresql-8.4|haproxy-1.4|perl-5.10|php-5.3found 1  times
            haproxy-1.4|perl-5.10|cron-1.4|ruby-1.9|php-5.3|mysql-5.1|diy-0.1|python-2.6|ruby-1.8|postgresql-8.4found 1 times
   
    Finished processing 2 / 2 hosts in 52.84 ms

I will get the following:

    [root@broker ~]# mco facts cart_list
    Report for fact: cart_list
    
            cron-1.4|diy-0.1|haproxy-1.4|mysql-5.1|perl-5.10|php-5.3|postgresql-8.4|python-2.6|ruby-1.8|ruby-1.9found 2 times
    
    Finished processing 2 / 2 hosts in 59.38 ms