Tests

Merge pull request #1428 from presztak/image_import_replace #3121

Job	Run time
Code (oldstable)	7m 32s
System (stable, cluster, dir)	12m 19s
Documentation	4m 52s
Code (stable)	7m 38s
System (stable, cluster, btrfs)	12m 4s
Client (oldstable, ubuntu-latest)	1m 6s
Code (tip)	10m 50s
System (stable, cluster, lvm)	12m 49s
Client (oldstable, macos-latest)	56s
System (stable, cluster, zfs)	14m 53s
Client (oldstable, windows-latest)	2m 22s
System (stable, cluster, ceph)	15m 45s
Client (stable, ubuntu-latest)	1m 8s
System (stable, cluster, random)	14m 11s
Client (stable, macos-latest)	1m 15s
System (stable, standalone, dir)	22m 31s
Client (stable, windows-latest)	2m 30s
System (stable, standalone, btrfs)	22m 14s
System (stable, standalone, lvm)	40m 37s
System (stable, standalone, zfs)	38m 51s
System (stable, standalone, ceph)	59m 30s
System (stable, standalone, random)	30m 42s
System (oldstable, cluster, dir)	10m 4s
System (oldstable, standalone, dir)	22m 30s
System (tip, cluster, dir)	15m 24s
System (tip, standalone, dir)	25m 21s
	6h 49m 54s

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