* Removes nulltype from python, updates samples
* Removes nulltype from the python requirements
* Removes nulltype import in models, moves requiredVars to optionalVars when approprieate
* Use system CA by default and remove certifi
See https://github.com/OpenAPITools/openapi-generator/issues/6506
* Use system CA by default in asyncio client
* Update README_onlypackage.mustache
* Result of ./bin/generate-samples.sh
* Add ssl_ca_cert argument for Configuration
* Result of ./bin/generate-samples.sh
* Remove certifi, use system CA by default
* Remove redundant encoding definitions
UTF-8 is already the default encoding in Python 3.
* Remove Python3.4 related requirements
* Remove dead Python version 3.5
* Add Python 3.9 to CI and test configs
* Update petstore example
* python->python-legacy, python-experimental->python
* test with openjdk8
* test with openjdk11
* comment out rm
* move kotlin tests to circleci
* move kotlin tests
* move tests to circleci
* fix circleci
* rearrange test
* move tests
* use wrapper
Co-authored-by: Justin Black <justin.a.black@gmail.com>
