feat(logs): simplify bundle logs (#268)

* avoid generating empty log files

'host-manager' and 'manager' webapps are not packaged within the bundle so
remove associated handlers that previously generated empty log files.
In addition, remove the 'localhost' handlers as no logger is associated to it.

* all logs in a single bonita.log file

This ensures that all logs of 3rd party libs are in bonita.log and simplify
logging configuration.

In the past, we have been forced to declare for most of 3rd party lib loggers
the right handler to ensure logs are generated in the bonita.log file. Most of
the time, this was done only after receiving external feedback on bug
investigations (information were lost or hidden in catalina log file).

Part of the work to hide Tomcat internals to the external world.