[java] Disable HttpClient logging

It took far too long to find this out, but JWebUnit comes bundled with the Logback logging component, so it won't even use log4j.properties or commons-logging.properties.

Instead, create a file called logback.xml and place it in your source code folder (in my case, src):

<configuration debug="false">
  <!-- definition of appender STDOUT -->
  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>%-4relative [%thread] %-5level %logger{35} - %msg %n</pattern>
    </encoder>
  </appender>

  <root level="ERROR">
    <!-- appender referenced after it is defined -->
    <appender-ref ref="STDOUT"/>
  </root> 
</configuration>

Logback looks to still be under development and the API seems to still be changing, so this code sample may fail in the future. See also this StackOverflow question.