qemu-dm-wrapper: Redirect qemu logs to syslog
qemu-dm-wrapper: Redirect qemu logs to syslog

Also replace uses of os.popen/os.system with direct use of the xenstore
python binding.

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