Improve DeviceStateTransition object name
Improve DeviceStateTransition object name

Change-Id: Id779570a41decc70ff558e1a3b3a31d4e98213eb

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