NiH pipeline is broken: request to TOP_URL gives `Connection reset by peer`

[jaklinger]

NiH data collection is failing at

  File "/home/ec2-user/nesta-nihagg/nesta/core/routines/datasets/nih/nih_collect_task.py", 
line 46, in prepare
    title, urls = get_data_urls(i)
  File "/home/ec2-user/nesta-nihagg/nesta/packages/nih/collect_nih.py", line 45, in get_dat
a_urls
    r = requests.get(TOP_URL, params={'index':tab_index})
...
requests.exceptions.ConnectionError: ('Connection aborted.', ConnectionResetError(104, 'Connection reset by peer'))