CP-775: use the good xenstore paths when communicating with the VSS provider.
CP-775: use the good xenstore paths when communicating with the VSS provider.

sharady/xcp-networkd,robhoes/squeezed,simonjbeaumont/xcp-rrdd,sharady/xcp-networkd,simonjbeaumont/xcp-rrdd,djs55/xcp-rrdd,koushikcgit/xcp-rrdd,djs55/xcp-networkd,koushikcgit/xcp-networkd,johnelse/xcp-rrdd,djs55/xcp-rrdd,djs55/squeezed,koushikcgit/xcp-rrdd,johnelse/xcp-rrdd,djs55/xcp-networkd,koushikcgit/xcp-networkd,koushikcgit/xcp-rrdd