Add new instance action: Resize.

[xuhang57]

Add a missing instance action: Resize.

Backend change: # 29

Description

Add a new action in the action bar: Resize. It will tell the user the quota change after resizing the instance. Work with v2/instances in the atmosphere. This PR needs refactor and I am trying my best to take out unused functions out from a few files. But, it has been tested and it could work, although producing production quality code is my goal 💯

Checklist before merging Pull Requests

• Refactor
• Unit test for the new functionality.
• Reviewed and approved by at least one other contributor.
• Wishlist

Wishlist:

• Have a new form rather than Resource Form
• Show the current flavor size.
• Disallow to resize for the at size
• Preventing any user from "downsize" the instance.

Thanks
Lucas

[jeremyfreudberg]

Hey Lucas, I logged in on 140 but I don't see resize option there.

Also, curious about this:

Prevent user from resizing the instance from a larger flavor to a smaller one.

Resizing should work both ways.

[xuhang57]

@jeremyfreudberg Thanks for checking! So your instance has to be at the final state (you will see a green circle and text as Active under the status column) to use resize action.

And currently, i am still working the PR so I am using it as a test server, which means, it is not so stable and it would be great if you could wait till tomorrow.

To answer your second question:

Rado discovered a problem about it. We can discuss this when you are at the team room. In general, there is a upstream bug about it. I'd happy to chat with you on this issue and figure out a solution.