D10410: Move the task of cleaning up of socket file to file ioslave and FdReceiver

[Chinmoy Ranjan Pradhan]

chinmoyr added a dependent revision: D10411: Create socket file in user's 
runtime directory.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D10410

To: chinmoyr, #frameworks, ossi
Cc: michaelh, ngraham