MSP-11145
This commit is a proof that the logger works. It does no connect the
adding tested payloads reference names to the
actual_ancestor_reference_name_set to show that the logger is working.
MSP-11145
ancestor_reference_name derivation was using the source_location of
initialize, but that didn't work for payload modules whose #initialize
was only in mixin Modules.
Luke Imhoff