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