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

Merge pull request !610 from wukesong/modify_lenet_alexnet_readme

Merge pull request !504 from candanzg/tensor_assign_with_slice

Merge pull request !605 from liubuyu/master

Merge pull request !590 from caifubi/set-fp-start-point-after-getnext

Merge pull request !181 from lyfne/cse_fix

Merge pull request !580 from panfengfeng/panff/fix_log_print_in_ge

Merge pull request !600 from dengwentao/modify_tbe_attr_log

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

Merge pull request !602 from zhoufeng/win-vc-runtime

Merge pull request !596 from JichenZhao/globalbn

Merge pull request !598 from VectorSL/fix-cudnn-type-error

Merge pull request !574 from liubuyu/master

Merge pull request !593 from biffex/fix-prim-hash-function

Merge pull request !454 from candanzg/bug_cast_op

Merge pull request !575 from dinghao/master

Merge pull request !510 from Alexey_Shevlyakov/fix_random_behaviour

Merge pull request !564 from YuJianfeng/master

Merge pull request !532 from lichen/support_multiple_subgraphs_in_auto_parallel

Merge pull request !594 from jonathan_yan/flockwin

Merge pull request !591 from xiefangqi/xfq_fix_random

Merge pull request !589 from zhangbuxue/fix_codedex

Merge pull request !588 from liuxiao/add-reluv2

Merge pull request !578 from leonwanghui/rename

Merge pull request !577 from leonwanghui/st-fix

Merge pull request !581 from ms_yan/para_num_check

Merge pull request !587 from jjfeing/master