Currently logging configuration is splitted in two distinct classes,
the api.pp and the logging.pp classes. This review aims to centralize
all logging related parameters in a single class, the logging.pp one.
The impacted parameters are :
* use_syslog
* use_stderr
* log_facility
* verbose
* debug
* log_dir
* log_file
This change remains backward compatible with what is currently in place.
Related-bug: #1515273
Change-Id: I76f51876e78015db722ff0fc37f6bcd76fd651f2
Signed-off-by: Gael Chamoulaud <gchamoul@redhat.com>
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