[python] Re-generate samples

Done with:

  rm -rf samples/client/echo_api/python/*
  rm -rf samples/openapi3/client/petstore/python/*
  git checkout -f HEAD -- samples/client/echo_api/python/tests
  git checkout -f HEAD -- samples/openapi3/client/petstore/python/tests
  /mvnw clean package -DskipTests
  ./bin/generate-samples.sh bin/configs/python.yaml bin/configs/python-echo-api.yaml

This highlights a number of file mode changes along with some tests and
docs for things that no longer exist in the relevant OpenAPI specs.

Signed-off-by: Stephen Finucane <stephen@that.guru>

Author: stephenfin

samples/client/echo_api/python/.openapi-generator/FILES

@@ -55,4 +55,22 @@ setup.cfg
 setup.py
 test-requirements.txt
 test/__init__.py
+test/test_auth_api.py
+test/test_bird.py
+test/test_body_api.py
+test/test_category.py
+test/test_data_query.py
+test/test_default_value.py
+test/test_form_api.py
+test/test_header_api.py
+test/test_number_properties_only.py
+test/test_path_api.py
+test/test_pet.py
+test/test_query.py
+test/test_query_api.py
+test/test_string_enum_ref.py
+test/test_tag.py
+test/test_test_form_object_multipart_request_marker.py
+test/test_test_query_style_deep_object_explode_true_object_all_of_query_object_parameter.py
+test/test_test_query_style_form_explode_true_array_string_query_object_parameter.py
 tox.ini