Removed private member _uuid. Use the opaque_ref instead since this is what the _uuid actually is.
Removed private member _uuid. Use the opaque_ref instead since this is what the _uuid actually is.

Signed-off-by: Konstantina Chremmou <a7d1f757a659045fb6db8c1e3849a1c8ad00b97a@citrix.com>

xapi-project/xen-api-sdk,xapi-project/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk,kc284/xen-api-sdk,kc284/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk,kc284/xen-api-sdk,xapi-project/xen-api-sdk