Retry on CondaHTTPError

Sometimes connection to the Anaconda server fails and a simple retry fixes it:

Example

  CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://conda.anaconda.org/bioconda/noarch/current_repodata.json>
  Elapsed: -
  
  An HTTP error occurred when trying to retrieve this URL.
  HTTP errors are often intermittent, and a simple retry will get you on your way.
  'https://conda.anaconda.org/bioconda/noarch'

If you think implementing this logic in the action (like three attempts, 10 seconds apart) is a good idea, I’ll be happy to implement it once the refactor is done!

[valeriupredoi]

We are running the tests nightly at 00:00 UTC, but I have noticed that tests run at other times than midnight UTC pass more frequently, maybe Anaconda is suffering from connection issues around 00:00 UTC? Someone playing Cyberpunk at night at Anaconda and hogging the bandwidth? 🤣

[jaimergp]

@mattwthompson is also reporting issues like these at openforcefield, I believe!