Merge pull request !6569 from chenjianping/lite_dev2

Merge pull request !6653 from chujinjin/fix_stream_sync_error_for_mixed_precision

Merge pull request !6689 from fary86/fix_error_report_line_info

Merge pull request !6616 from yoonlee666/token

Merge pull request !6683 from caojian05/ms_master_googlenet_readme_support_imagenet

Merge pull request !6499 from john_tzanakakis/master_ms1_grpc

(cherry picked from commit 17a5995e97)

Merge pull request !6428 from fuzhiye/tmp

Merge pull request !6613 from huangbingjian/master

Merge pull request !6682 from luoyang/pylint

Merge pull request !6591 from maning202007/checknull

Merge pull request !6659 from wukesong/add-hub

Merge pull request !6464 from pengyongrong/op_format_toNC4HW4

Merge pull request !6680 from wuxuejian/padding_grad

Merge pull request !6661 from vlne-v1/code_style

Merge pull request !6665 from wangmin0104/master

Merge pull request !6651 from lijiaqi/init

Leaf ops do self-reset.

embed python compose op

add implicit compose op

more tests

Merge pull request !6606 from caojian05/ms_master_googlenet_shell_script_support_imagenet

Merge pull request !6626 from hexia/master

Merge pull request !6604 from luoyang/pylint

Merge pull request !6652 from VectorSL/sqrt

Merge pull request !6505 from 张清华/master2

Merge pull request !6650 from zhaodezan/master

Merge pull request !6655 from 徐安越/master

Merge pull request !6649 from xiaotianci/modify_converse