SLING-3053: Scala integration tests failure: type Logger is not a member of package ch.qos.logback.classic
Special case ch.qos.logback.classic.Logger as this class is not accessible during script execution

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1522060 13f79535-47bb-0310-9956-ffa450edef68