vmadm - support multiple cdrom options

vmadm.diff

29c29
< var VM = require('/opt/vm/node_modules/VM');
---
> var VM = require('VM');
231,238c231
<           if(key === 'cdrom') {
<               if(!parsed[key]) {
<                   parsed[key] = [];
<               }
<               parsed[key].push(val);
<           } else {
<               parsed[key] = val;
<           }
---
>             parsed[key] = val;
260,261d252
<         for(var i=0; i<parsed[key].length; i++) {
<           val = parsed[key][i];
275d265
<        }