Merge pull request !2587 from imaaamin/object_ops_ut

!2590 Updated Python UTs for RandomVerticalFlipWithBBox, RandomCropWithBBox and RandomResizedCropWithBBox
Merge pull request !2590 from danishnxt/AugOps2

Merge pull request !2532 from ava/NNNewMaster

Merge pull request !2586 from Jamie/dataset_subtree

Merge pull request !2589 from chenzhongming/fix_ckpt

updates

fix

fix cpplint

fix

Merge pull request !2473 from lixiachen/compute_column_map

!2533 Fixing testVOC2012 dataset by merging with testVOC2012_2 + moving BBoxOp testing functions to util + new check in Bounding_Box_check
Merge pull request !2533 from danishnxt/AugOpsD2

Style Error fix

fixed PyLint problem

reverting testVOC2012 due to CI break for existing test

reverting testVOC2012 due to CI break for existing test-2

updated old error messages to confirm with global standard

addressing PR 2355 Comments - 1

addressing PR 2355 Comments - 2

addressing PR 2355 Comments - 3

Merge pull request !2544 from rick_sanchez/huangyong

Merge pull request !2576 from amongo/AddBackAssignValue

Merge pull request !2526 from Alexey_Shevlyakov/alex_fix_memory_leak

Merge pull request !2534 from h.farahat/slice_api

Merge pull request !2374 from MahdiRahmaniHanzaki/I1L892-pad-cutout-ut

Merge pull request !2566 from liuwenhao/arg

Merge pull request !2569 from Chong/zc

Merge pull request !2545 from zhangbuxue/remove_the_comment_for_the_example

Merge pull request !2511 from wangqiuliang/add-tensor-mod-operation

Merge pull request !2548 from amongo/fixmapmapping

Merge pull request !2490 from gukecai/new-stream-for-commit

Merge pull request !2558 from jjfeing/master

Merge pull request !2551 from ms_yan/GetTensor_repair

Merge pull request !2572 from jinyaohui/backend_master

Merge pull request !2552 from chenjianping/host_reduce

Merge pull request !2445 from jinyaohui/print

Merge pull request !2559 from liuwenhao/rms

Merge pull request !2541 from leopz/master