Merge branch 'feature/fileupload'
fix Lex upload command response in the API. Fix typo in upload error message.
fix failing tests resulting from fixing typo in upload error message.
Use new FileUtilities::replaceSpecialCharacters and FileUtilities::createAllFolders

 - remove associated tests since tests are done in the FileUtilities own tests.
Merge remote-tracking branch 'lf/master' into feature/fileupload
add lex project zip file upload