Remove sleep time waiting for log files to be closed

User or Developer story

As a WMCO developer, I want to remove the hack waiting for log files to be closed.

Description

A sleep time has been introduced waiting for the hybrid-overlay log file to be closed as it could not be accesssed for deletion even after cleaning up the service.
We need to remove this hack as it is not guaranteed to work in all setups.

Engineering Details

As discussed with the team, alternative is to move the node object deletion out of the WICD cleanup command back to WMCO responsibilities  so that even if the file cleanup fails the reconciliation process can take care of the cleanup. Currently the reconciliation fails if the node object is already deleted.