nova-service-cleaner job deletes the service which are down. If the
database is down, the service will go down as well. When database comes
back up, all the services starts to come back to up status. If the
nova-service-cleaner is run in this interim time, the service that
were down gets deleted. These would have come up if the job had not
run. Adding sleep to this job to give service time to come back up
if recovering. The sleep is set to 2 times the report_interval.
Change-Id: Ia292d19508e9449ccb40d1100b1d56b1283e5d53
0c80a415bf