AMBARI-8014. Tune log4j parameters to reduce logs in ambari-server when slider view is enabled

ambari-server/conf/unix/log4j.properties

@@ -35,3 +35,7 @@ log4j.appender.configchange=org.apache.log4j.FileAppender
 log4j.appender.configchange.File=/var/log/ambari-server/ambari-config-changes.log
 log4j.appender.configchange.layout=org.apache.log4j.PatternLayout
 log4j.appender.configchange.layout.ConversionPattern=%d{ISO8601} %5p - %m%n
+
+log4j.logger.org.apache.hadoop.yarn.client=WARN
+log4j.logger.org.apache.slider.common.tools.SliderUtils=WARN
+log4j.logger.org.apache.ambari.server.security.authorization=WARN