Merge pull request #342 from mtomaschewski/delete-device

events: do not delete dbus object immediately
fsm: clear hierarchy when destroy worker
ifup: apply wait-for-interfaces in direct ifup
Merge pull request #343 from pwieczorkiewicz/clear_hierarchy

fsm: clear hierarchy when destroy worker
Merge pull request #344 from mtomaschewski/wait-for-interfaces-1

ifup: apply wait-for-interfaces in direct ifup
ifreload: apply wait-for-interfaces in ifreload
Merge pull request #345 from mtomaschewski/wait-for-interfaces-2

ifreload: apply wait-for-interfaces in ifreload