Checkstyle logging rules

added rules:
-avoid using printStackTrace
-avoid using System.out|err.print
-logger must be declared as "private static final"
-no more than one logger declared
-avoid using string concatenation in log message
-logger variable name must be "LOG"
-LoggerFactory#getLogger input Class type parameter is equal to wrapping class name.
-logger must be Slf4j
-log message placeholders count equals to parameters count following (excluding exception type param.)

Change-Id: I6da0c22d80de032eb047b4ca8776f2a38c4a4959
Signed-off-by: Milos Fabian <milfabia@cisco.com>
Merge "Checkstyle logging rules"