Move host/port from ConnectionConfiguration to XMPPConnection

There semantic is that they now report the host used to establish the
connection. Therefore BOSHConfiguration needs to hostAddresses for
getURI().

tcp/src/main/java/org/jivesoftware/smack/TCPConnection.java

@@ -439,7 +439,8 @@ public class TCPConnection extends XMPPConnection {
             }
             if (exception == null) {
                 // We found a host to connect to, break here
-                config.setUsedHostAddress(hostAddress);
+                host = hostAddress.getFQDN();
+                port = hostAddress.getPort();
                 break;
             }
             hostAddress.setException(exception);