[logback-dev] Tests written in scala migrated to Java

Hi all, FYI, tests previously written in Scala were re-written in Java as can be seen in my latest commit [1]. This simplifies the steps required in order to build logback [2]. Cheers, -- Ceki [1] https://github.com/qos-ch/logback/commit/cc50828820dce5 [2] http://jira.qos.ch/browse/LOGBACK-828