'Return the list of valid os_versions for the given breed'

def get_valid_os_versions_for_breed(self, breed, token=None, **rest):

    self._log('get_valid_os_versions_for_breed', token=token)
    results = utils.get_valid_os_versions_for_breed(breed)
    results.sort()
    return self.xmlrpc_hacks(results)
