`show task` output should show names instead of UUIDs

[quintessence]

Currently the output of show task shows the job and archive UUIDs:

$ shield show task 88851692-d3ee-4e76-9a8b-a4e3fec56e19
UUID:         88851692-d3ee-4e76-9a8b-a4e3fec56e19
Owner:        quinn@
Type:         backup
Status:       done

Started at:   Fri, 05 Feb 2016 18:49:37 +0000
Stopped at:   Fri, 05 Feb 2016 19:41:23 +0000

Job UUID:     194195c5-5012-4ef4-b03b-35ea9a97a87c
Archive UUID: 346416ff-beb6-4d49-94ee-b1e804dae7cc

Log:

Instead of the job name, e.g.:

$ shield show task 88851692-d3ee-4e76-9a8b-a4e3fec56e19
UUID:         88851692-d3ee-4e76-9a8b-a4e3fec56e19
Owner:        quinn@
Type:         backup
Status:       done

Started at:   Fri, 05 Feb 2016 18:49:37 +0000
Stopped at:   Fri, 05 Feb 2016 19:41:23 +0000

Job Name:     uswest2-pr-postgresql-docker
Archive UUID: 346416ff-beb6-4d49-94ee-b1e804dae7cc

Log: