fix bug: wrong output dimension when "keep_dims" is false in pooling layer.

* fix bug in max layer

* code align

* delete permute layer and add test case

* add name assert

* check other cases

* remove c++11 features

* style:add "const" remove assert

* style:sanitize file names

Fix resize+concat optimization

* fix resize+concat optimization

* add comment and fix indentation

* Aligned OpenCV DNN and TF sum op behaviour

Support Mat (shape: [1, m, k, n] ) + Vec (shape: [1, 1, 1, n]) operation
by vec to mat expansion

* Added code corrections: backend, minor refactoring

* add LeakyRelu to tf-importer

* fix whitespace error

* added test for leakyrelu

Relates to OpenCV issue #18721

Fixes OpenCV issue #18721

Add support for Conv1D on OpenCV backend

* Add support for Conv1D on OpenCV backend

* disable tests on other targets/backends

* Fix formatting

* Restore comment

* Remove unnecessary flag and fix test logic

* Fix perf test

* fix braces

* Fix indentation, assert check and remove unnecessary condition

* Remove unnecessary changes

* Add test cases for variable weights and bias

* dnn(conv): fallback on OpenCV+CPU instead of failures

* coding style

* Supported ReduceSum op

* Skip test

* Added ClipByValue subgraph

* Return const nodes

* Custom layers with nGraph

* nGraph: multiple outputs from nodes

Add lightweight IE hardware targets checks

nGraph: Concat with paddings

Enable more nGraph tests

Restore FP32->FP16 for GPU plugin of IE

try to fix buildbot

Use lightweight IE targets check only starts from R4

* Support nGraph

* Fix resize