reduce test logging

Author: hauner

src/test/resources/logback-test.xml

@@ -1,4 +1,5 @@
 <configuration>
+<!--
   <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
     <encoder>
       <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
@@ -8,4 +9,5 @@
   <root level="debug">
     <appender-ref ref="STDOUT" />
   </root>
+ -->
 </configuration>