disabled issueOwner when add new issue coz it should belong to current
user
set default value for issueTrackor and issueOwner in questionAnswer.gsp
fixed a bug of not saving questionAnswer data in
paraseQuestionAnswerData of FIlePublishService
removed default mapping in IssueTrack
fixed a bug that it should saved the issueState in handleQuestionAnswer
fixed that trackor is editable for the old issues
added a feature that issue handle cannot be empty while status closed
added validation js for selectIncludeUser.gsp