Modify Gandi.net driver to use Libcloud http(s) layer when performing
http requests using xmlrpclib.

This change allows driver to support LIBCLOUD_DEBUG and SSL vertificate
validation functionality. Previously it used xmlrpclib directly which means
it bypassed Libcloud's http(s) layer and didn't support previously
mentioned features.

Contributed by John Carr, part of LIBCLOUD-288.


git-svn-id: https://svn.apache.org/repos/asf/libcloud/trunk@1441956 13f79535-47bb-0310-9956-ffa450edef68