Allows a job with a MultiFileRecordReader and no input files not to fail

[okayawright]

easy-batch/easy-batch-core/src/main/java/org/jeasy/batch/core/reader/AbstractMultiFileRecordReader.java

Line 77 in 647ce81

currentFile = iterator.next();

I believe the line could be changed to :

currentFile = iterator.hasNext() ? iterator.next() : null;

in order to allow a job with no input files not to fail, just to report as COMPLETE even if it didn't process anything