Depending on the context classloader is fragile.

I think a better solution here would be either to pass the `play.api.Application.classloader` to `NingAsyncHttpClientConfigBuilder`, and use that, or load the class earlier, ie make `SSLConfig.hostnameVerifierClassName` an `Option[Class]` (and rename it to `...Class` not `...ClassName`), and pass the `play.api.Application.classloader` to the `DefaultSSLConfigParser`.  The latter I think is cleaner.