python-novaclient SSL CA certificate validation

Following the commit by Adam Young, we discover that python-novaclient tries to validate the CA chain
(https://github.com/openstack/keystone/commit/8de61f8af43563b1d93291c868634810d9e42902)

So in case that the CA certificate is not bundled with the distribution, it refuses to do any operation due to the invalid certificate chain.

This could be solved by specifying an extra parameter with the CA chain in python-novaclient and pass it to httplib2 component.
or bypass the CA certificate validation

--- novaclient/client.py.orig 2012-07-13 16:44:17.401494239 +0200
+++ novaclient/client.py 2012-07-13 16:44:41.172496060 +0200
@@ -57,7 +57,7 @@

         # httplib2 overrides
         self.force_exception_to_status_code = True
- self.disable_ssl_certificate_validation = insecure
+ self.disable_ssl_certificate_validation = True

     def http_log(self, args, kwargs, resp, body):
         if 'NOVACLIENT_DEBUG' in os.environ and os.environ['NOVACLIENT_DEBUG']: