Merge pull request !3837 from liucunwei/add_test_for_mindrecord3

Merge pull request !3814 from liucunwei/enhance_map_file_for_imagenet

Merge pull request !3622 from EricZ/distributed_sampler_fix

Merge pull request !3760 from 34bunny/GPU-ResizeNearestNeighbor-fix

Merge pull request !3619 from danishnxt/GPU_One

Added Distributed sampler option

Fix style

Merge pull request !3549 from anthonyaje/device_augment_mapop_refactor1

Merge pull request !3553 from tony_liu2/staging

Merge pull request !3780 from baihuawei/losscuda

Merge pull request !3739 from laiyongqiang/eliminate_memcpy_bug

Merge pull request !3119 from dengyutao/remove_blockreader

Merge pull request !3537 from riemann_penn/add_sparse_operator

Merge pull request !3737 from JoyLvliang/enlarge-the-threshold-of-resnet50-performance-st-in-pynative

Merge pull request !3727 from xiefangqi/fuzz_issue_pad_01

Merge pull request !3645 from chenzhongming/master

Merge pull request !3671 from ms_yan/vgg_optimize

add mindspore.hub and change model_zoo

Merge pull request !3657 from yangzhenzhang/add-stridedslice-op

Merge pull request !3655 from chenweifeng/broadcast_to

Merge pull request !3707 from chenweifeng/LayerNorm

Merge pull request !3405 from gziyan/fix_optimizer_parallel

box copying fix

common function for IOU

new sort func

final update + unit test

remove one comment

fix lintig -1

lint fix 2

lint fix 3

last lint fix

value fix in ST nms with mask

addressing comments

 pylint fix

 pylint fix 1

test file fix

fix line lengths

fix spacing

reverse a few changes

Merge pull request !3341 from tom_chen/maxpool_with_argmax

Merge pull request !3574 from hewei/rename_user_data_func

Merge pull request !3603 from jiangzhiwen/fix_column_names_exceeded

Merge pull request !3620 from 张学同/to_merge

Merge pull request !3270 from thlinh/dev_Jul17_removeSelect

Merge pull request !3612 from changzherui/mod_case

Refactored MapOp to in preparation to support device augment

Minor fix