[ACS44] cherry pick CLOUDSTACK-6478

[Min Chen]

Hi Hugo/Daan,
        
        Would you please cherry-pick following commit from 4.4-forward branch to
4.4 branch?

        Commit: f3e9c84cddbc0ab7b89f8000dd0db42ba1570d28
        CLOUDSTACK-6478: Failed to download Template when having 3 SSVM's in one
zone on Vmware.
        
        Thanks
        -min