Get node objects from AWS.

def nodes_aws(c_obj):
    """Get node objects from AWS."""
    aws_nodes = []
    try:
        aws_nodes = c_obj.list_nodes()
    except BaseHTTPError as e:
        abort_err("\r HTTP Error with AWS: {}".format(e))
    aws_nodes = adj_nodes_aws(aws_nodes)
    return aws_nodes