Created by: 123malin

PR types

New features

PR changes

APIs

Describe

1. add paddle.fleet.role_maker, including rolemakerBase, PaddleCloudRoleMaker, UserDefinedRoleMaker
2. add paddle.fleet.util_factory, including set_file_system, collective apis（barrier, all_reduce, all_gather)，and other debug tools(e.g. program_check, params_check...)