Steve Martinelli f15352f861 clean up image choices and help text ...

Use choices for image set and image create commands, this aligns
with our use of choices in networking commands.

Also update the help text to match that of the networking
commands, where we iterate through the options.

Related-Bug: 1635518
Change-Id: Ib4c66b06e07f1d4e5bfe1b74053f2215cccad890

2016-11-23 22:52:33 +05:30

22 KiB

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