Using logback with Karaf 3.0.5 running under Servi

Question

I am trying to use logback with Karaf 3.0.5 running under ServiceMix. This is what I have done till now as mentioned in this question.

This is what I have done till now:-

1. Removed pax-logging-service by doing uninstall <pax-logging-bundle-id>
2. Removed lib/bin/karaf-client.jar
3. Inside lib placed the following jars:- jcl-over-slf4j-1.7.13, jul-to-slfj-17.13.jar, logback-classic-1.0.13.jar, logback-core-1.0.13.jar & osgi-over-slf4j-1.7.13.jar
4. From /etc/startup.properties - removed references to pax-logging-service and pax-logging-api
5. In etc/config.properties under org.osgi.framework.system.packages.extraadded the following packages:- ch.qos.logback; version="1.0.13", \ org.slf4j; version="1.7.13", \
6. Created a logback.xml and and placed it inside /etc.
7. Commented out everything in etc/org.ops4j.pax.logging.cfg
8. In etc/system.properties add logback.configurationFile="etc/logback.xml"

My logback.xml looks like below:-

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
    </appender>
    <appender name="FILE"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>/var/log/workflow/WorkFlow.%d{yyyy-MM-dd}.log
            </fileNamePattern>
            <maxHistory>7</maxHistory>
        </rollingPolicy>
    </appender>
    <root level="info">
        <appender-ref ref="CONSOLE"/>
        <appender-ref ref="FILE"/>
    </root>
</configuration>

Karaf info reports the following:-

karaf@root>info
Karaf
  Karaf version               3.0.5
  Karaf home                  /home/jabong/Downloads/software/dev/apache-servicemix-6.1.0
  Karaf base                  /home/jabong/Downloads/software/dev/apache-servicemix-6.1.0
  Karaf etc                   /home/jabong/Downloads/software/dev/apache-servicemix-6.1.0/etc
  OSGi Framework              org.apache.felix.framework - 4.2.1

But after making the above changes we are not seeing any log file under /var/log/workflow nor I am seeing the info logs.