Support authorization retransmits in VertxHttpClientHTTPConduit

[ppalaga]

When the remote endpoint responds 401 (HTTP_UNAUTHORIZED) or 407 (HTTP_PROXY_AUTH) the conduit should be able to get the auth token and retransmit the payload. See esp. org.apache.cxf.transport.http.HTTPConduit.WrappedOutputStream.authorizationRetransmit() and how it is called.