Logback configuration to keep unit tests quiet.

logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%r [%thread] %-5level %logger - %msg%n</pattern>
        </encoder>
    </appender>
    <root>
        <level value="error" />
        <appender-ref ref="STDOUT" />
    </root>
</configuration>