Pulp

When using the generated Python API client with Pulp 3, I was unable to reference any entities by the `pulp_href` because the client would URL-encode all of the slashes in the HREF when combining it with the base URL. This led to a `LocationParseException` coming out of `urllib3` every time.

Setting `safe_chars_for_path_param = '/'` in the client configuration worked around the issue, but since the client isn't usable without this magic configuration, it should be either set by default or clearly documented.

The pulp-openapi-generator[0] project should be updated to include `safe_chars_for_path_param = '/'` as the default setting.

[0] https://github.com/pulp/pulp-openapi-generator