Merge pull request !841 from zhangbuxue/adapt_ExtractImagePatches_and_fix_EluGrad

Merge pull request !823 from huanghui/BatchNormGrad-split-pass

Merge pull request !845 from fary86/add_error_type_index_error

Merge pull request !848 from yanghaitao/yht_generator_sampler_numshards

Merge pull request !84 from zhaozhenlong/adapt-apply-adam-d

Merge pull request !721 from candanzg/tensor_assgin_ellipsis

Merge pull request !727 from Chong/cost

Merge pull request !846 from 梅晓蔚/master

Merge pull request !814 from xychow/compare-with-context-ptr

Merge pull request !802 from chenfei_mindspore/move-opt-into-build-graph

Merge pull request !81 from yanzhenxiang2020/fix_isfinite_input_check

1. Remove the records of user graphs;
2. Remove the records of user value nodes;
3. Remove the records of user cnodes;
4. Add the records of users, and the API to access the users of graph, value node, and cnode;
5. Fix issue:User cnode record may point to its own graph, when combine the user(caller) and used one(callee);
6. Fix issue:User graphs never update itself after its first creation.

Merge pull request !75 from changzherui/syn-code428

Merge pull request !749 from wenkai/wkmaster

Merge pull request !730 from yuanhan/master

Merge pull request !83 from zhaozhenlong/adapt-apply-adam

Signed-off-by: candanzg <zhangshucheng@huawei.com>

Merge pull request !767 from vlne-v1/I1F48Y-with-eval-cell-show-cast-is-not-support-in-gpu-pynative

Merge pull request !816 from flywind/combine_opt

Merge pull request !795 from jinyaohui/clean_pylint_0428

fix some ci failures

more ci fixes

more ci fails

yet another ci fail

more ci stuff

still ci

more ci

more ci

more ci

Merge pull request !831 from JesseKLee/check_rc

Merge pull request !563 from zhaoting/add-YOLOv3-infer-scipt-and-change-dataset-to-MindRecord