[python] Fixes Configuration w/ access_token at initialization (#14153)

* Fixes templates

* Samples regenerated

* Adds discard_unknown_keys back in, regenerates samples

samples/openapi3/client/petstore/python/docs/apis/tags/PetApi.md

@@ -104,9 +104,9 @@ configuration = petstore_api.Configuration(
 
 # Configure OAuth2 access token for authorization: petstore_auth
 configuration = petstore_api.Configuration(
-    host = "http://petstore.swagger.io:80/v2"
+    host = "http://petstore.swagger.io:80/v2",
+    access_token = 'YOUR_ACCESS_TOKEN'
 )
-configuration.access_token = 'YOUR_ACCESS_TOKEN'
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -218,9 +218,9 @@ configuration = petstore_api.Configuration(
 
 # Configure OAuth2 access token for authorization: petstore_auth
 configuration = petstore_api.Configuration(
-    host = "http://petstore.swagger.io:80/v2"
+    host = "http://petstore.swagger.io:80/v2",
+    access_token = 'YOUR_ACCESS_TOKEN'
 )
-configuration.access_token = 'YOUR_ACCESS_TOKEN'
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -404,9 +404,9 @@ configuration = petstore_api.Configuration(
 
 # Configure OAuth2 access token for authorization: petstore_auth
 configuration = petstore_api.Configuration(
-    host = "http://petstore.swagger.io:80/v2"
+    host = "http://petstore.swagger.io:80/v2",
+    access_token = 'YOUR_ACCESS_TOKEN'
 )
-configuration.access_token = 'YOUR_ACCESS_TOKEN'
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -598,9 +598,9 @@ configuration = petstore_api.Configuration(
 
 # Configure OAuth2 access token for authorization: petstore_auth
 configuration = petstore_api.Configuration(
-    host = "http://petstore.swagger.io:80/v2"
+    host = "http://petstore.swagger.io:80/v2",
+    access_token = 'YOUR_ACCESS_TOKEN'
 )
-configuration.access_token = 'YOUR_ACCESS_TOKEN'
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -912,9 +912,9 @@ configuration = petstore_api.Configuration(
 
 # Configure OAuth2 access token for authorization: petstore_auth
 configuration = petstore_api.Configuration(
-    host = "http://petstore.swagger.io:80/v2"
+    host = "http://petstore.swagger.io:80/v2",
+    access_token = 'YOUR_ACCESS_TOKEN'
 )
-configuration.access_token = 'YOUR_ACCESS_TOKEN'
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -1034,9 +1034,9 @@ configuration = petstore_api.Configuration(
 
 # Configure OAuth2 access token for authorization: petstore_auth
 configuration = petstore_api.Configuration(
-    host = "http://petstore.swagger.io:80/v2"
+    host = "http://petstore.swagger.io:80/v2",
+    access_token = 'YOUR_ACCESS_TOKEN'
 )
-configuration.access_token = 'YOUR_ACCESS_TOKEN'
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -1159,9 +1159,9 @@ configuration = petstore_api.Configuration(
 
 # Configure OAuth2 access token for authorization: petstore_auth
 configuration = petstore_api.Configuration(
-    host = "http://petstore.swagger.io:80/v2"
+    host = "http://petstore.swagger.io:80/v2",
+    access_token = 'YOUR_ACCESS_TOKEN'
 )
-configuration.access_token = 'YOUR_ACCESS_TOKEN'
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class
@@ -1293,9 +1293,9 @@ configuration = petstore_api.Configuration(
 
 # Configure OAuth2 access token for authorization: petstore_auth
 configuration = petstore_api.Configuration(
-    host = "http://petstore.swagger.io:80/v2"
+    host = "http://petstore.swagger.io:80/v2",
+    access_token = 'YOUR_ACCESS_TOKEN'
 )
-configuration.access_token = 'YOUR_ACCESS_TOKEN'
 # Enter a context with an instance of the API client
 with petstore_api.ApiClient(configuration) as api_client:
     # Create an instance of the API class

samples/openapi3/client/petstore/python/petstore_api/configuration.py

@@ -157,15 +157,22 @@ conf = petstore_api.Configuration(
 
     _default = None
 
-    def __init__(self, host=None,
-                 api_key=None, api_key_prefix=None,
-                 username=None, password=None,
-                 discard_unknown_keys=False,
-                 disabled_client_side_validations="",
-                 signing_info=None,
-                 server_index=None, server_variables=None,
-                 server_operation_index=None, server_operation_variables=None,
-                 ):
+    def __init__(
+        self,
+        host=None,
+        api_key=None,
+        api_key_prefix=None,
+        username=None,
+        password=None,
+        discard_unknown_keys=False,
+        disabled_client_side_validations="",
+        signing_info=None,
+        server_index=None,
+        server_variables=None,
+        server_operation_index=None,
+        server_operation_variables=None,
+        access_token=None,
+    ):
         """Constructor
         """
         self._base_path = "http://petstore.swagger.io:80/v2" if host is None else host