Exclude "test" from packages so that it is not installed as top-level package when "pip installing" the generated sdk (#3731)

Author: akaegi

modules/openapi-generator/src/main/resources/python/setup.mustache

@@ -32,7 +32,7 @@ setup(
     url="{{packageUrl}}",
     keywords=["OpenAPI", "OpenAPI-Generator", "{{{appName}}}"],
     install_requires=REQUIRES,
-    packages=find_packages(),
+    packages=find_packages(exclude=["test", "tests"]),
     include_package_data=True,
     long_description="""\
     {{appDescription}}  # noqa: E501