Exception logging

[amitmi704]

Would it be possible to add the ability to mute exception printing to stdio, or remove it all together? The storage of the exception into the result is sufficient.

[ktbyers]

Turn on Nornir logging and provide a log file, I think that will cause it to stop being written to stdout. I believe this is an aspect of Python logging i.e. if there is no logging destination it writes it to standard out.

Let me know if that works.