* Update license to new year

* Pick up some strays

* Fix used operator for reversing input sequences in LSTM.

* Fix backward pass for bidirectional LSTM.

* UT for LSTM with sequence_lens shorter than input sequence size.

* Skip LSTM UT using ReverseSequence since it is not supported yet on
PlaidML.

* Move HardSigmoid to nGraph fused operators.

* UT for HardSigmoid fused operator.

* Add type_prop UT.

* Activation function parameters and hardsigmoid activation function.

* UT for lstm with hardsigmoid activation function.

* Reorder operations in implementation.

* Fix unit tests.

* Fix typo.

* Change stored activation function to pure function pointer.

* Apply style-check.

* [ONNX] Refactor LSTM tests to use NgraphTestCase

* Enable passing instance values to comparator

* Style apply.

* Fix style, syntax

* Change order of class member to fix errors.

* Switch to single-precision parameters.

* Disable unit test for IGPU.

* [ONNX] Refactor LSTM tests to use NgraphTestCase

* Enable passing instance values to comparator

* Review comments

* Move ONNX tests to the test/onnx subdirectory

* Change non-conforming test names

* Refactor quant and reshape tests to separate files

* Refactor tests into separate files

* Rename test in GPU excludes