Camel 4.5 - Trace config

[davsclaus]

Describe the feature here

The backlog tracer has its configuration moved into its own group like the debug already have
https://issues.apache.org/jira/browse/CAMEL-20472

Its probably easier to see what we did for CSB to learn what may need to be done in CEQ
apache/camel-spring-boot@3e8de47

There is a DebugConfig.java in CEQ today, so maybe a TraceConfig.java needs to be created. As trace is very similar to how debug config is.

[zhfeng]

@davsclaus please take a look at the PR and I wonder if there is any way to test with these trace configuration?

[davsclaus]

use null instead of empty string. For testing them I am afraid you can only test like its tested in the core project. But generally its not really needed as core tests the tracing functionality, and CEQ is just a facade on setting the options.