services/mgmt/device/deviced: programmatically raise GOMAXPROCS on devicemanager
services/mgmt/device/deviced: programmatically raise GOMAXPROCS on devicemanager

Change-Id: I9ea7427a3d1ebe9d8f272914da430516e472648d

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref