storage interface: plumb through SR.stat

Now a XenAPI SR.update will call SR.stat.

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Plumb VDI.resize through the SMAPIv2

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Update storage_interface to latest and fix up fallout.

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
Use xcp-idl for storage interface rather than our own copy

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
Switch to using xcp ocamlfind packages from xcp-idl

Conflicts:

	ocaml/OMakefile
	ocaml/network/OMakefile
	ocaml/network/network_interface.ml
	ocaml/rrdd/interface/OMakefile
	ocaml/sm-cli/OMakefile
	ocaml/test/OMakefile
	ocaml/xapi/OMakefile
	ocaml/xenops/memory_interface.ml
	ocaml/xenops/xenops_client.ml
	ocaml/xenops/xenops_interface.ml

Conflicts:
	ocaml/network/OMakefile
	ocaml/rrdd/OMakefile
	ocaml/rrdd/interface/OMakefile
	ocaml/test/OMakefile
	ocaml/xapi/OMakefile
	ocaml/xenops/OMakefile
	ocaml/xenops/memory_client.ml
	ocaml/xenops/memory_interface.ml
	ocaml/xenops/squeeze_xen.ml
	ocaml/xenops/squeezed.ml
	ocaml/xenops/xenops_client.ml
	ocaml/xenops/xenops_interface.ml
	ocaml/xenops/xenops_server.ml
	ocaml/xenops/xenops_server_xen.ml

Merged-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>