Properly handle uptimes over a year on AIX

[rmcleod8]

Description

The existing Ohai plugin for returning uptime on AIX machines doesn't account for the year in which the box was booted leading to false positives and negative values

Issues Resolved

Sample of existing issue

Ohai:
--
"uptime_seconds": -4845099,
"uptime": "22 hours 08 minutes 21 seconds",
 
s178 # uptime
09:16AM   up 308 days,  22:10,  4 users,  load average: 7.60, 9.58, 11.85
s178 # who -b
.        system boot Oct 27 11:07

Check List

• New functionality includes tests
• All tests pass
• RELEASE_NOTES.md, has been updated if required (not required for bugfixes, required for API changes)
• All commits have been signed-off for the Developer Certificate of Origin. See https://github.com/chef/chef/blob/master/CONTRIBUTING.md#developer-certification-of-origin-dco

[tas50]

Thanks for including the comments explaining exactly why you were doing things. That's really helpful years later when we try to understand these things.

[adamleff]

Huge 👍 for the helpful comments, @rmcleod8. Thanks for fixing this issue!