Fixing Logging Prefix/Category on several classes

There are still several classes using the old prefix/category convention for logging after migrating to Log4j2 with SLF4.

For this reason, the messages on those classes are not properly routed to the log.

For example:

private final Logger logger = LoggerFactory.getLogger("OpenNMS.Poller." + JCifsMonitor.class.getName());

should be:

private final Logger logger = LoggerFactory.getLogger(JCifsMonitor.class);