Logger configuration

Currently, Kylin use Log4j 1.2 as logger library.

File Name	Affect Scope	Comment
kylin-server-log4j.properties	Kylin Instance, Sparder Driver
kylin-tools-log4j.properties	Kylin CLI
kylin-driver-log4j.properties	Driver	Logger of Query and Cubing
kylin-driver-log4j-default.properties	Driver	Using default org.apache.log4j.ConsoleAppender
kylin-executor-log4j.properties	Executor	Logger of Query and Cubing
kylin-executor-log4j-default.properties	Executor	Using default org.apache.log4j.ConsoleAppender

Path	Type	Log From
$KYLIN_HOME/logs/kylin.log	Local	Output of Kylin's Logger(Log4j.12) Output of Driver of Sparder
$KYLIN_HOME/logs/kylin.out	Local	stderr of Kylin Instance
$KYLIN_HOME/logs/spark/xxx.log	Local	Driver of Cubing Job (if SparkDriverHdfsAppender is disabled)
${WORKING-DIR}/${project_name}/spark_logs/driver/${step_id}/execute_output.json.timestamp.log	HDFS	Driver of Cubing Job (if SparkDriverHdfsAppender is enabled)
${WORKING-DIR}/${project_name}/spark_logs/executor/yyyy-mm-dd/${job_id}/${step_id}/executor-x.log	HDFS	Executor of Cubing Job (if SparkExecutorHdfsAppender is enabled)
${WORKING-DIR}/_sparder_logs/executor/yyyy-mm-dd/${job_id}/${step_id}/executor-x.log	HDFS	Executor of Query Job (if SparkExecutorHdfsAppender is enabled)

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