bcdafa3831
We've found that, on fresh systems where the ZBF run completes almost instantaneously, the Swift logs (syslog by default) get filled-up with object ZBF scan start and completion messages. This patch calls self._sleep() between ZBF scan runs to cut-down on these messages and the related unnecessary ZBF scan runs without impacting the integrity of the object auditing process. Change-Id: I057c5ca235467cfa115a7a3d44e21c350900059a