Support to set inter_op_parallelism_threads and intra_op_parallelism_threads for ResNet (#3502)
Support to set inter_op_parallelism_threads and intra_op_parallelism_threads for ResNet (#3502)

* Adding support to set inter_op_parallelism_threads and intra_op_parallelism_threads for official/resnet

* Addressing review comments

derekjchow/models,derekjchow/models,tombstone/models,derekjchow/models,alexgorban/models,tombstone/models,cshallue/models,tombstone/models,jiaphuan/models,cshallue/models,tombstone/models,cshallue/models,cshallue/models,alexgorban/models,jiaphuan/models,tombstone/models,alexgorban/models,jiaphuan/models,tombstone/models,derekjchow/models,alexgorban/models,jiaphuan/models,jiaphuan/models,jiaphuan/models,derekjchow/models,alexgorban/models,cshallue/models