Until numpy version 1.20.0, numpy.unicode was an alias for str in python3. In 1.20.0, it's fully deprecated and is an int. This is bad and breaks things. This commit drops the np.unicode alias and just uses str, as is advised here:
https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations
* Enhance the AppConfig with external config sources.
The external config sources are currently environment variables
and AWS secrets manager.
The config file can be augmented with a section describing how
environmen variables and secrets can update config parameters.
benefits:
- it will enable the config to draw from more than one secret. This is useful
for shared secrets between cellxgene and data portal, as well as auth0 secrets.
- it will make it very straightforward to check the config before a deployment.
Part of #1859
* split out config
* add tests for base and app config, refactor client config out of app config
* refactor default config retrieval
* create config test class and helper functions
* move default_config into server to fix import issue
