Merge pull request !5662 from wandongdong/master

Merge pull request !5666 from limingqi107/master

Merge pull request !5653 from liuxiao78/master

Merge pull request !5661 from yao_yf/auto_parallel_reshape_fix

Merge pull request !5516 from yao_yf/auto_parallel_context_collation

Merge pull request !5646 from ZiruiWu/coco_fix_up

Merge pull request !5473 from jinyaohui/master

Merge pull request !5643 from chenjianping/lite_dev2

Merge pull request !5630 from ling/optimize

Merge pull request !5482 from liuyang/md_save_checkpoint

Merge pull request !5647 from XunDeng/pp_issue_branch

Merge pull request !5615 from luoyang/c-api-pyfunc

Merge pull request !5508 from YuJianfeng/adam_assign

Merge pull request !5611 from Margaret_wangrui/get_loop

Merge pull request !5650 from 治愈系潇洒哥/master

Merge pull request !5635 from chenzupeng/master-lite

Merge pull request !5387 from lixiachen/testcase_epoch

Merge pull request !4204 from fary86/adapt_primitive_dynamic_shape

Merge pull request !5625 from wenchunjiang/fix_memory_leak

Merge pull request !5604 from yeyunpeng2020/master_caffe_slice

Merge pull request !5638 from 张清华/master

Merge pull request !5641 from zhangbuxue/check_user_define_bprop_when_there_is_parameter_in_nested_network

Merge pull request !5085 from lixiachen/cache_hostname

Merge pull request !4998 from JesseKLee/mem_pool

Merge pull request !5644 from kisnwang/async-run-graph

Merge pull request !5458 from danishnxt/GPU_two

Merge pull request !5639 from wangmin0104/master

Merge pull request !5587 from caojian05/ms_googlenet_readme_update