Rename categories_tree.json to category_tree.json (#307)

1 job for master in 17 minutes and 52 seconds (queued for 49 seconds)
latest
Status Job ID Name Coverage
  Build
failed #110343
docker
job

00:17:52

 
Name Stage Failure
failed
job Build
    raise e
File "download.py", line 229, in get_from_api
content_dict = json.loads(response_str)
ValueError: Expected object or value

real 13m52.946s
user 0m22.000s
sys 0m1.052s
ERROR: Job failed: exit code 1