Changed dummy regex (in perfmon) to one that cannot match anything.
Changed dummy regex (in perfmon) to one that cannot match anything.

Signed-off-by: Thomas Sanders <c547603d2dd860735c4f0c043b1348f5c48c02f8@citrix.com>

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