There is a spurious completion signal in nova compute config which is
confusing and unnecessary.
Change-Id: I302470933c80443a1069faa03cc924f14ba71ca3
Co-Author: Nicholas Randon
           tenant-name: {get_input: live_update_tenant_name}
           base_image_id: {get_input: nova_image}
           live_update_image_id: {get_input: live_update_compute_image}
-        completion-signal: {get_input: deploy_signal_id}
         ntp:
           servers:
               - {server: {get_input: ntp_server}, fudge: "stratum 0"}