Merge pull request !1538 from wandongdong/r0.3

Cleanup dataset UT: restore config support

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

Merge pull request !1355 from lichen/fix_gatherv2

Merge pull request !1329 from ougongchang/master

Merge pull request !1369 from ms_yan/del_storage

Merge pull request !1375 from cathwong/ckw_dataset_ut_cleanup5

Merge pull request !1377 from Tinazhang/cc

Merge pull request !1365 from h.farahat/text_namespace

add some unittest for summary operator

support ScalarSummary to record number type

Merge pull request !1308 from h.farahat/string_tensor2

Merge pull request !1370 from yihuaijie/master

Merge pull request !1249 from heleiwang/hlw_gnn_data

Merge pull request !1363 from zhangbuxue/Not_support_mixed_tensor_as_index_for_tensor_getitem_and_setitem

Merge pull request !1348 from yihuaijie/master

Merge pull request !1320 from JichenZhao/applyrms_squaresumall_cumprod_reduceprod

Merge pull request !1349 from ghzl/add-group-check-for-lars

Merge pull request !1352 from liyong126/mindrecord_fix_bug_I1HQUI

add support for MindRecord and TFRecord
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optimize tensorshape

optimize tensorshape and FlatIndex

TFRecord and MindRecord support for string tensor

Modify mem layout
Add new constructor
Add method Allocate

Change some GetMutableBuffer usages to AllocateBuffer

Merge pull request !1341 from ZiruiWu/vocab_and_lookup

Merge pull request !1317 from liyong126/mindrecord_compress

Merge pull request !1133 from zhangbuxue/support_tensor_get_value_by_tensor_index

Merge pull request !1245 from wangnan39/add_model_init_api_to_compile_df_graph_before_train_and_eval

Merge pull request !1281 from Peilin/splitOp

Merge pull request !1342 from Tinazhang/cc