Add missing argument for completeness worker
Add missing argument for completeness worker

There was a missing argument, as well as as a missing call to self.class
for symbolize_keys which prevented the completeness metric from working.
This commit fixes that.

Signed-off-by: Konrad Reiche <4ff0213f56e2082fcd8c882d04c546881c579ce4@gmail.com>

platzhirsch/metadata-census