Tests

Clarify device override syntax #3216

Job	Run time
Documentation	5m 44s
Code (oldstable)	7m 56s
Client (oldstable, ubuntu-latest)	29s
System (stable, cluster, dir)	13m 31s
Code (stable)	7m 30s
Client (oldstable, macos-latest)	52s
System (stable, cluster, btrfs)	12m 2s
Code (tip)	10m 28s
Client (oldstable, windows-latest)	1m 11s
System (stable, cluster, lvm)	13m 51s
Client (stable, ubuntu-latest)	34s
System (stable, cluster, zfs)	12m 40s
Client (stable, macos-latest)	33s
System (stable, cluster, ceph)	16m 7s
Client (stable, windows-latest)	1m 41s
System (stable, cluster, random)	12m 30s
System (stable, standalone, dir)	23m 35s
System (stable, standalone, btrfs)	22m 13s
System (stable, standalone, lvm)	40m 4s
System (stable, standalone, zfs)	38m 46s
System (stable, standalone, ceph)	1h 17m 5s
System (stable, standalone, random)	22m 47s
System (oldstable, cluster, dir)	12m 35s
System (oldstable, standalone, dir)	22m 19s
System (tip, cluster, dir)	15m 59s
System (tip, standalone, dir)	25m 22s
	6h 58m 24s

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