Suggestion: ability to use aio-lib-cloudmanager with a HTTP proxy

I have a suggestion - hopefully that's the right place.

In some corporate intranets it is only possible to access the cloudmanager api through a proxy. In such a situation it would be very helpful if aio-lib-cloudmanager would support that. As of version 1.0.0 it's not possible to do that with aio-lib-cloudmanager , though the underlying httpclient framework nicely supports that. That is, it's not possible without either modifying the aio-lib-cloudmanager code, or pulling some really nasty tricks like modifying the private final field apiClient in CloudManagerApi ...
Thanks a lot!

BTW: I needed to use the ApacheConnectorProvider for the ApiClient to use a proxy, JettyConnectorProvider would probably work, too.

#### Platform and Version

java8 aio-lib-cloudmanager version 1.0.0 on, well, Java 8

Inizia ricostruendo come CloudManagerApi crea o riceve il suo apiClient privato final, quindi esamina il supporto sottostante ai proxy di ApiClient e le opzioni ApacheConnectorProvider e JettyConnectorProvider menzionate nell’issue. Il lavoro è completo quando i chiamanti possono configurare l’accesso al proxy HTTP tramite aio-lib-cloudmanager senza modificare campi privati né usare workaround.

Scritto dal modello di indicizzazione a partire dal testo della issue.