[python-pydantic-v1] various improvements (#16658)

* rename, add tests

* remove library support in python pydantic v1 codegen

* copy tests

* copy echo api tests

* update samples

* update doc

* add back library support

samples/client/echo_api/python-pydantic-v1/test/test_query.py

@@ -3,20 +3,22 @@
 """
     Echo Server API
 
-    Echo Server API
+    Echo Server API  # noqa: E501
 
     The version of the OpenAPI document: 0.1.0
     Contact: team@openapitools.org
-    Generated by OpenAPI Generator (https://openapi-generator.tech)
+    Generated by: https://openapi-generator.tech
+"""
 
-    Do not edit the class manually.
-"""  # noqa: E501
 
+from __future__ import absolute_import
 
 import unittest
 import datetime
 
+import openapi_client
 from openapi_client.models.query import Query  # noqa: E501
+from openapi_client.rest import ApiException
 
 class TestQuery(unittest.TestCase):
     """Query unit test stubs"""
@@ -27,22 +29,22 @@ class TestQuery(unittest.TestCase):
     def tearDown(self):
         pass
 
-    def make_instance(self, include_optional) -> Query:
+    def make_instance(self, include_optional):
         """Test Query
             include_option is a boolean, when False only required
             params are included, when True both required and
             optional params are included """
         # uncomment below to create an instance of `Query`
         """
-        model = Query()  # noqa: E501
-        if include_optional:
+        model = openapi_client.models.query.Query()  # noqa: E501
+        if include_optional :
             return Query(
-                id = 56,
+                id = 56, 
                 outcomes = [
                     'SUCCESS'
                     ]
             )
-        else:
+        else :
             return Query(
         )
         """