update Migration request Remove API and update listFileLumis API by adding the validFileOnly flag.
add unittests for lisFileLumis API.
fixed a validation bug on validFileOnly and update the migtation remove dao.
add unittests for filesummaries and handle none number input for validFileOnly
add validFileOnly to listFileLumis client API
Merge pull request #423 from yuyiguo/issue413

Issue413