Created by: jczaja

This PR adress the issue reported in #17611 (closed) by making Reusing concept thread safe. Currently only part of ops were adapted. After sorting out an issue #17960 (closed) additional PR for Relu, pooling and INT8 prims will be raised.

@luotao1 I have updated this branch couple of hours ago, so please double check if this PR works for you. If ContentDNN is not working then it means that Relu and other missing ops has to be updated as well. Anyway please share error messages if any.