* Fix tracing tests
The tests were not working properly.
1. Some test was setting a global subscriber, this could lead to racy
conditions with other tests.
2. A logging test called `process::exit` which is completly wrong.
* Update client/tracing/src/lib.rs
Co-authored-by: David <dvdplm@gmail.com>
* Review comments
Co-authored-by: David <dvdplm@gmail.com>