Add example YAML for loggerconfig option

It's really difficult to find documentation on what needs to be in the optional ini, yaml, or json files.
This snippet comes out of the test case from the source code.

It should, at least, give people a place to start when using this option.
Remove unnecessary YAML document separator.
Merge pull request #827 from eikonomega/patch-1

Add example YAML for loggerconfig option