Storage domain is required for vm first disk creation

error: syntax error at "--storage_domains-storage_domain-id", see help on collection based arguments for more details.

this bug caused by incorrect parameter representation in RSDL,
storage_domains [1] implemented as collection while RSDL reporting 
it as Type

[1]

    public List<StorageDomain> getStorageDomains() {
        if (storageDomains == null) {
            storageDomains = new ArrayList<StorageDomain>();
        }
        return this.storageDomains;
    }

my bad, - (was on old branch), current RSDL impl is correct (see cli help [1]), usage is not, Elena please always review /help/ to determinate correct option format.

[1]

     Overload 1:
     
     * --size: int
     * --type: string
     * --interface: string
     * --format: string
     * [--sparse: boolean]
     * [--bootable: boolean]
     * [--shareable: boolean]
     * [--allow_snapshot: boolean]
     * [--propagate_errors: boolean]
     * [--wipe_after_delete: boolean]
     * [--storage_domains: collection]
       {
         [storage_domain.id|name: string]
       }