D18563: Don't create directory tree when a new folder has a '/' in the name

[Shubham]

shubham added a dependent revision: D18599: Use specific error message if 
file/folder name contains '/'.

REPOSITORY
  R241 KIO

BRANCH
  dir

REVISION DETAIL
  https://phabricator.kde.org/D18563

To: shubham, ngraham, #frameworks, #dolphin, dfaure, elvisangelaccio, pino
Cc: dfaure, elvisangelaccio, pino, kde-frameworks-devel, michaelh, ngraham, 
bruns