Log audio file on loading errors
Seems theres some formatting errors, could you run `python setup.py style --scope nemo --fix` This PR will be merged into another PR (https://github.com/NVIDIA/NeMo/pull/2240) due to inactivity. One difference is that it will not raise the error, but instead simply log that the file was not loaded properly. Got it, sorry for the delay and thanks for the followup! Thanks for the PR! Normally I'd wait, but this PR would have merge conflicts with that one so it would be easier to integrate into that one. 
Signed-off-by: Anas Abou Allaban <aabouallaban@pm.me>

It would be helpful to know offending audio files that fail to load if they are corrupt and/or not supported.