config_load_check_tool segfault with sds file

*Title*: *config_load_check_tool v1.15.0 segfault with sds file*

*Description*:
When validating configs that reference sds resources via files the config_load_check_tool segfaults after loading the static config and starting to load the sds resources. This is specific to 1.15 as this worked fine with prior versions

*Repro steps*:
run config_load_check_tool against a configuration that uses sds files. example config that causes error https://gist.github.com/mtalbot/e54a5182e941dda47aa624664f615ea5