Allow the d02 debian installer grub device to be overriden in device-dictionary
Allow the d02 debian installer grub device to be overriden in device-dictionary

Change-Id: I1d386653ea1ab70f05c6b519439631957489971d

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