rhbz980658 rearrange source upload method to prepare for better structuring
rhbz980658 add GlobalDocumentId with tests
Merge branch 'master' into refactor-file-storage
move virus scan exception handling to lower level
move source upload authorization exception handling to lower level
remove obsolete throws declaration
Merge pull request #51 from zanata/refactor-file-storage

A few preliminary changes to preparing FileService to use new backend