framework for easy creation of Enterprise Application Integration tasks

Changes for 1.2

• fixed some problems in checkLogExist.pl, removed no warnings 'redundant' in DateUtil (causes problems with perl<5.20 tests), remove @previousline and @previoustempline in EAI::File as previous lines can anyway accessed using $data, fixed evalCustomCode in both EAI::File and EAI::Wrap and added some testcases.