'Delete the provided server group
:param group_name: string - the server group to delete
:return: none'

def _delete_group(self, group_name):

    response = None
    (group, parent) = self.group_dict.get(group_name)
    try:
        response = group.Delete()
    except CLCException as ex:
        self.module.fail_json(msg='Failed    to    delete    group    :{0}.    {1}'.format(group_name, ex.response_text))
    return response
