[python] Renames python generators (#7965)

* 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>

samples/openapi3/client/features/dynamic-servers/python/README.md

@@ -0,0 +1,115 @@
+# dynamic-servers
+This specification shows how to use dynamic servers.
+
+This Python package is automatically generated by the [OpenAPI Generator](https://openapi-generator.tech) project:
+
+- API version: 1.0.0
+- Package version: 1.0.0
+- Build package: org.openapitools.codegen.languages.PythonClientCodegen
+
+## Requirements.
+
+Python >= 3.5
+
+## Installation & Usage
+### pip install
+
+If the python package is hosted on a repository, you can install directly using:
+
+```sh
+pip install git+https://github.com/GIT_USER_ID/GIT_REPO_ID.git
+```
+(you may need to run `pip` with root permission: `sudo pip install git+https://github.com/GIT_USER_ID/GIT_REPO_ID.git`)
+
+Then import the package:
+```python
+import dynamic_servers
+```
+
+### Setuptools
+
+Install via [Setuptools](http://pypi.python.org/pypi/setuptools).
+
+```sh
+python setup.py install --user
+```
+(or `sudo python setup.py install` to install the package for all users)
+
+Then import the package:
+```python
+import dynamic_servers
+```
+
+## Getting Started
+
+Please follow the [installation procedure](#installation--usage) and then run the following:
+
+```python
+
+import time
+import dynamic_servers
+from pprint import pprint
+from dynamic_servers.api import usage_api
+# Defining the host is optional and defaults to http://petstore.swagger.io:80/v2
+# See configuration.py for a list of all supported configuration parameters.
+configuration = dynamic_servers.Configuration(
+    host = "http://petstore.swagger.io:80/v2"
+)
+
+
+
+# Enter a context with an instance of the API client
+with dynamic_servers.ApiClient(configuration) as api_client:
+    # Create an instance of the API class
+    api_instance = usage_api.UsageApi(api_client)
+    
+    try:
+        # Use custom server
+        api_response = api_instance.custom_server()
+        pprint(api_response)
+    except dynamic_servers.ApiException as e:
+        print("Exception when calling UsageApi->custom_server: %s\n" % e)
+```
+
+## Documentation for API Endpoints
+
+All URIs are relative to *http://petstore.swagger.io:80/v2*
+
+Class | Method | HTTP request | Description
+------------ | ------------- | ------------- | -------------
+*UsageApi* | [**custom_server**](docs/UsageApi.md#custom_server) | **GET** /custom | Use custom server
+*UsageApi* | [**default_server**](docs/UsageApi.md#default_server) | **GET** /default | Use default server
+
+
+## Documentation For Models
+
+
+
+## Documentation For Authorization
+
+ All endpoints do not require authorization.
+
+## Author
+
+
+
+
+## Notes for Large OpenAPI documents
+If the OpenAPI document is large, imports in dynamic_servers.apis and dynamic_servers.models may fail with a
+RecursionError indicating the maximum recursion limit has been exceeded. In that case, there are a couple of solutions:
+
+Solution 1:
+Use specific imports for apis and models like:
+- `from dynamic_servers.api.default_api import DefaultApi`
+- `from dynamic_servers.model.pet import Pet`
+
+Solution 1:
+Before importing the package, adjust the maximum recursion limit as shown below:
+```
+import sys
+sys.setrecursionlimit(1500)
+import dynamic_servers
+from dynamic_servers.apis import *
+from dynamic_servers.models import *
+```
+