CLOUDSTACK-6202

[Yichi Lu]

I am currently working on this issue. What should datetime string look like
for expires? I am thinking of something like:
"-e 2011-10-10T12:00:00+0530", or "--expires=2011-10-10T12:00:00+0530". But
this may not be convenient for many people, especially the UTC part
(+0530). Another way of doing this is to add minutes from Now. For example,
"--expires=+60", meaning the api call will expire 60 minutes from issuing
the call.
Thoughts, suggestions?
Yichi