Need to override libcloud to find the machine type in the proper zone.

def __get_size(conn, vm_):
    '''
    Need to override libcloud to find the machine type in the proper zone.
    '''
    size = config.get_cloud_config_value(
        'size', vm_, __opts__, default='n1-standard-1', search_global=False)
    return conn.ex_get_size(size, __get_location(conn, vm_))