Rudder

We have some logger that are extremenly usefull for debugging some kind of things but are not discoverable by an user.

So we have to put then in the default logback file (with accpetable log level) and comments on what they do, why/how use them.

Examples are:

- the logger wich output all LDAP request
- timing info about generation process
- cache invalidation / hit (node, compliance, etc)
- new node acceptation

...

The change can go in 2.11 as most of the add will be comments or things that don't actually do anything (because log level will be off)