update uploaded file with stored on save.
Merge branch 'update-uploaded-file-on-save' of git://github.com/formapro/VichUploaderBundle into formapro-update-uploaded-file-on-save
Reverts "Merge branch 'update_file_after_upload'

Reverts changes of PR #93 in order to use code from
changes made to 98adfab805c9e7d7145aca39fde58a716f2d3b75.
Rreverts commit e93430523c5961a0b81214ee133064501acc88ab.