* 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
* Separate userinfo from the config endpoint
previously information about if the user was logged in and their username
was part of the config endpoint.
However, the config endpoint was previously static, and has a cache control.
Rather than not caching the config, a new endpoint called "userinfo"
is created to handle that information.
The config endpoint still has the non-changing part of the authentication:
config:
authentication:
requires_client_login: True/False
login: <uri to login endoint if requires_client_login is True>
logout: <uri to logout endoint if requires_client_login is True>
The userinfo endpoint returns this information:
userinfo:
is_authenticated: True/False
username: <string if is_authenticated>
if authentication is not enabled then the config does not have an authentication key,
and userinfo returns None.
Also in the PR are a few minor code improvements and bug fixes
Co-authored-by: Colin Megill <colinmegill@gmail.com>
