Merge pull request !607 from fary86/optimize_flow_of_exporting_onnx_model

Merge pull request !621 from liyong126/mindrecord_ut

Merge pull request !627 from fary86/fix_glog_default_path_is_tmp

Merge pull request !631 from AdelShafiei/uniform_augment_ut

Merge pull request !630 from alashkari/ua-ops

Merge pull request !557 from caojian05/mindspore_master_dev

Merge pull request !616 from caojian05/mindspore_master_bugfix

Merge pull request !625 from JoyLvliang/fix-check-nullptr-by-calling-function

Merge pull request !554 from huanghui/fix_derelu_fusion_pass

Merge pull request !626 from limingqi107/master

Merge pull request !620 from Xiaoda/fix-codex-bot-warnings

Merge pull request !599 from dinghao/master

Merge pull request !492 from YuJianfeng/allgather

Merge pull request !619 from JoyLvliang/pynative-clean-reviewbot-warning

Merge pull request !615 from Simson/push-to-opensource

Merge pull request !556 from Chong/partition

Merge pull request !611 from JichenZhao/errormsg

Merge pull request !612 from huanghui/fix-confusion-softmax-grad-rule-pass

Merge pull request !549 from wsc/bert_readme

Merge pull request !613 from liubuyu/master

Merge pull request !606 from pengyanjun/fix_dataset_api_doc_change_line

Merge pull request !572 from gengdongjie/master

Merge pull request !604 from yanghaitao/yht_generatordataset_col_list

Merge pull request !582 from ZPaC/add-dynamic-lr-in-nccl-case

add cache for PythonPrimEvaluator. Be careful that
 the infer function of PythonPrimitive in python code should
 be idempotent.

Merge pull request !573 from seatea/fix-parse-attribute-bug

Merge pull request !375 from fary86/add_prim_name_to_error_message_for_grad_ops

Merge pull request !461 from wsc/master