generalized export to both itn and tn
This pull request **introduces 1 alert** when merging f5bf7fe4827595ac8b290ca8e002357ac4e29814 into 88af7a24a7ebb4418cb51c328e2c03aed8388e03 - [view on LGTM.com](https://lgtm.com/projects/g/NVIDIA/NeMo/rev/pr-b5d3cd734613603214c2207eab3527795ce634af)

**new alerts:**

* 1 for Unused import
Signed-off-by: Yang Zhang <yangzhang@nvidia.com>