Additional sleep for cases when tape library doesn't update in time

tapebackup/utils/tapemanager.py

@@ -339,6 +339,8 @@ class TapeManager:
         # umount is **obligatory**, otherwise it hangs to death
         movemedium = device.movemedium(self.robot[0]['element_address'], self.drives[0]['element_address'], slot)
         log.info("Moved tape from %d to slot %d", self.drives[0]['element_address'], slot)
+        time.sleep(30)
+        log.info("Sleeping for 30 seconds to update tape inventory")
         return movemedium
 
     def move(self, slot_from, slot_to):