HPCC-9857 Configmr - Crashes if referencing a missing HW node

Signed-off-by: Gleb Aronsky <gleb.aronsky@lexisnexis.com>
Merge pull request #4741 from garonsky/issue-9857_configmgr_crashes_if_node_in_hw_missing

HPCC-9857 Configmr - Crashes if referencing a missing HW node

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>