Show reserved devices in Job tables.
Show reserved devices in Job tables.

LAVA-951: make it clearer which jobs are related
to reserved devices.

Change-Id: I26012df79d03b78931595fa9b1688455c2629f77

Linaro/lava-server,Linaro/lava-server,OSSystems/lava-server,OSSystems/lava-server,OSSystems/lava-server,Linaro/lava-server,Linaro/lava-server