def ostemplates
      volumes = @compute_resource.images_by_storage('vztmpl',params[:storage])
      respond_to do |format|
        format.json { render :json => volumes }
      end
    end
def ostemplates
      volumes = @compute_resource.images_by_storage('vztmpl',params[:storage])
      respond_to do |format|
        format.json { render :json => volumes }
      end
    end
GET foreman_fog_proxmox/ostemplates/:storage