In manageEdxDb.py: carefully integrated dealing with directory level of tracking log files shifting. Hope I got all cases covered.
In manageEdxDb.py: carefully integrated dealing with directory level of tracking log files shifting. Hope I got all cases covered.

paepcke/json_to_relation,paepcke/json_to_relation,paepcke/json_to_relation,paepcke/json_to_relation