Polyanalyst6api

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Bugfixes

- Removed retries on SSLError to quickly surface certificate issues during login

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Bugfixes

- Fixed Drive.download_file method to use Rest API endpoint

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Features

- Added connection timeout to API requests (fixes hangs when pa server doesn't respond) (T41932)
- Added retries to requests with linear backoff for PABusy error. Deprecated ignore_first_n_pabusy parameters in `Project.execute` method (pabusy)
- Added support of Token-Based authentication (token)

Bugfixes

- Fixed urllib3 import error when using polyanalyst6api in python 3.7 (py37import)

Improved Documentation

- Fixed typos in documentation (doc)

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- Added a new parameter to prj.execute to ignore the first specified number of PABusy errors

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- Fix waiting state when importing a project.

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No significant changes.