Java uses the logback logger when running test, which has a default level of
DEBUG. To change the level, an XML config file is needed. This adds a config
file with level of ERROR. This config file is not used automatically and it's
location needs to be specified. One way to specify this via command line is:
`mvn -Dlogback.configurationFile=file:${ARROW_HOME}/java/dev/logback.xml`.
[ Full content available at: https://github.com/apache/arrow/pull/2465 ]
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