Deploy a new device
http://validation.linaro.org/static/docs/lava-dispatcher/tftp-deploy.html
http://validation.linaro.org/static/docs/lava-dispatcher/nexus-deploy.html
http://validation.linaro.org/static/docs/lava-dispatcher/ipmi-pxe-deploy.html
http://validation.linaro.org/static/docs/lava-dispatcher/ipxe-deploy.html