* Moved FrameworkNode to nGraph * Moved graph comparator to ngraph test util * Fixed build * Try to fix centos * Fix export target * Moved engine utils to separate library * Removed ONNX util from common library * Fixed build * Fixed code style
* Changed clang-format * Fixed code style for tests * Fixed build * Fixed code style
* Add visitor tests for VariadicSplit. * Add backend tests sceleton. * Add backend unit tests. * Add backend tests with dynamic function. * Remove redundand headers. * Modified backend tests to check also scalar axis. * Remove unused headers. * Changed backend tests to test `-1` value in split_lenghts tensor. * Const correctness improved in validate_and_infer_types. * Add VariadicSplit to summarize.py.