suppressing hyper verbose spark logs during unit test execution

dhp-workflows/dhp-graph-mapper/src/test/resources/log4j.properties

@@ -5,4 +5,11 @@ log4j.rootLogger=DEBUG, stdout
 log4j.appender.stdout=org.apache.log4j.ConsoleAppender
 log4j.appender.stdout.Target=System.out
 log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
-log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
+log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
+
+# Change this to set Spark log level
+log4j.logger.org.apache.spark=WARN
+# Silence akka remoting
+log4j.logger.Remoting=WARN
+# Ignore messages below warning level from Jetty, because it's a bit verbose
+log4j.logger.org.eclipse.jetty=WARN