CA-77830: Added a try...with close to avoid Not_found when finding a key in a map.
CA-77830: Added a try...with close to avoid Not_found when finding a key in a map.

Signed-off-by: Vincent Bernardoff <8e5719c1570e7a2e4cdddc970cf6a6ad782911a1@ocamlpro.com>

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