Merge pull request !1504 from wandongdong/master

Merge pull request !1512 from yao_yf/fix_reshape_reshape_graph

Merge pull request !1398 from chenhaozhe/update_bert_script

Merge pull request !1407 from zhangbuxue/support_mixed_tensor_for_tensor_get_item_and_tensor_set_item

Merge pull request !1446 from liuxiao78/master

Merge pull request !1383 from amongo/KeepPrimAttrInCNode

Merge pull request !1472 from yihuaijie/master

Merge pull request !1477 from jiangjinsheng/BatchToSpaceND

Merge pull request !1457 from Peilin/splitOp-after-testing

add another test case

typo

merge conflict

another PR changed testing behavior, updated test cases in this commit

added input check for use_sampler

addressed code review comments

fixed pylint, not related to my changes

resolve review

modify infer to get abstract value and attr value map together

support get attr in specialize

clone primitive when specialize if attribute is not the same with
infered attribute

Merge pull request !1277 from liuwenhao/master

Merge pull request !1447 from yihuaijie/master

Merge pull request !1427 from panyifeng/fix_check_bprop_attr_error

Merge pull request !1455 from cathwong/ckw_dataset_config_util

Merge pull request !1379 from Tinazhang/linearTrans

Merge pull request !1414 from zhaozhenlong/fix-issues-reshape-replace-flattern-grad

Merge pull request !1300 from liuxiao/RangeD

Merge pull request !1160 from wangqiuliang/add-backward-hook-in-pynative-mode

Merge pull request !1389 from h.farahat/fix_security_issues

Merge pull request !1380 from Peilin/shuffle-subsequent-epoch-deterministic

Merge pull request !1394 from heleiwang/fix_comments_error