[AURORA-1316] Consolidate last_modified in client update output

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.9.0
• Component/s: Client, Usability
• Assignee: Joe Smith
• Reporter: Joe Smith
• Created: 09/May/15 16:55
• Updated: 20/Jul/15 16:43
• Resolved: 12/May/15 00:42

Description

If they run an update info they'll see:

$ aurora update info us-west/myservice/environment/job_name 9001-dh1bab-unique-update-id --write-json
{
<snip>
  "last_updated": 1431056513956,
<snip>

However, if they do update list:

$ aurora update list us-west/myservice/environment/job_name  --write-json
    "lastModified": "2015-05-08T19:01:03",
<snip>

My intuition is we should consolidate to use lastModified with the same formatted timestamp, as that will be both human- and machine-readable.