Update to latest xapi.

Requires ocaml-rrd-transport and ocaml-rrdd-plugin updates too.

Signed-off-by: Jon Ludlam <jonathan.ludlam@citrix.com>
Update the config file with the necessary parameters

Signed-off-by: Jon Ludlam <jonathan.ludlam@citrix.com>
Merge pull request #565 from jonludlam/new-xapi

Update to latest xapi.