Merge pull request !343 from amongo/FixGradUsingInterfaceExtend

Merge pull request !314 from VectorSL/assign

Merge pull request !392 from caifubi/use-graphid-as-key-in-ascend-kernel-runtime

Merge pull request !217 from zhangbuxue/support_pow_operator

!332 Fixing problems including class slice example in ME cannot run, adding an example for class SigmoidCrossEntropyWIthLogits in ME etc.
Merge pull request !332 from zhangzheng/master

Merge pull request !379 from JichenZhao/groupnorm

Merge pull request !382 from yangzhenzhang/sigmoidloss

Fixing problem issues including class slice example cannot run, adding an example for class SigmoidCrossEntropyWithLogits etc.

add test case for grad concat

fix usage in test framework

fix testcase

format code

Merge pull request !389 from leonwanghui/dockerfile

Signed-off-by: Nleonwanghui <wanghui71leon@gmail.com>

Merge pull request !342 from zjun/fix_log_level

Merge pull request !376 from wenchunjiang/getnext_pass

Merge pull request !374 from chenfei/share-mem-of-parameter-between-child-graph

Merge pull request !380 from chenjianping/build-bat-support-input

Merge pull request !371 from ZPaC/add-gpu-distributed-ci-test-case

Merge pull request !360 from ZPaC/gpu-backend-supports-multiple-streams

Merge pull request !373 from Simson/push-to-opensource

Merge pull request !285 from ZhangQinghua/master