Checkpoint commit for OPENDJ-1288 :
Migrate I18n and logging support to i18n framework and SLF4J
* Move classes from org.opends.server.loggers.debug
to org.opends.server.loggers
** Impact FileBasedAccessLogPublisher and
FileBasedDebugLogPublisher XML configurations
** Impact config.ldif
* Reduce visibility of classes and methods in
org.opends.server.loggers package
* Align logging method names to trace and traceException
in DebugLogPublisher classes
* Clean DebugTracer class
* Add class LoggingCategoryNames to retrieve simple
category name (eg, CORE) from class name
* Temporary removal of opendj-slf4j-adapter module
and disabling of TestBackupAndRestore tests to
avoid build failure