Guess we need to remove `sudo: false` a.k.a are required root permission for Elasticsearch to write to the log files.

Although the specs are passing, we are having the error below:

22.82s$ SERVER=launch TEST_CLUSTER_COMMAND=/usr/share/elasticsearch/bin/elasticsearch TEST_CLUSTER_PARAMS='-Des.default.path.conf=/etc/elasticsearch/ -Des.default.path.logs=/var/log/elasticsearch/' TEST_CLUSTER_PORT=19250 bundle exec rspec
Starting 1 Elasticsearch nodes...log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: /var/log/elasticsearch/elasticsearch_test.log (Permission denied)
	at java.io.FileOutputStream.open(Native Method)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:142)
	at org.apache.log4j.FileAppender.setFile(FileAppender.java:294)
	at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:165)
	at org.apache.log4j.DailyRollingFileAppender.activateOptions(DailyRollingFileAppender.java:223)
	at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:307)
	at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:172)
	at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:104)
	at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:842)
	at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:768)
	at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648)
	at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514)
	at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:440)
	at org.elasticsearch.common.logging.log4j.LogConfigurator.configure(LogConfigurator.java:101)
	at org.elasticsearch.bootstrap.Bootstrap.setupLogging(Bootstrap.java:94)
	at org.elasticsearch.bootstrap.Bootstrap.main(Bootstrap.java:178)
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:32)
log4j:ERROR Either File or DatePattern options are not set for appender [file].
log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: /var/log/elasticsearch/elasticsearch_test_index_indexing_slowlog.log (Permission denied)
	at java.io.FileOutputStream.open(Native Method)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:142)
	at org.apache.log4j.FileAppender.setFile(FileAppender.java:294)
	at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:165)
	at org.apache.log4j.DailyRollingFileAppender.activateOptions(DailyRollingFileAppender.java:223)
	at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:307)
	at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:172)
	at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:104)
	at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:842)
	at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:768)
	at org.apache.log4j.PropertyConfigurator.parseCatsAndRenderers(PropertyConfigurator.java:672)
	at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:516)
	at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:440)
	at org.elasticsearch.common.logging.log4j.LogConfigurator.configure(LogConfigurator.java:101)
	at org.elasticsearch.bootstrap.Bootstrap.setupLogging(Bootstrap.java:94)
	at org.elasticsearch.bootstrap.Bootstrap.main(Bootstrap.java:178)
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:32)
log4j:ERROR Either File or DatePattern options are not set for appender [index_indexing_slow_log_file].
log4j:ERROR setFile(null,true) call failed.