Support creating a swap volume in `simple_vm`

[strugee]

This should be a boolean flag passed to the module that, if set to true, will create an additional OpenStack volume (destroyed when the instance is destroyed) and attach it to the instance.

[ChanceHarrison]

It sounds like this would require OSUOSL credentials and that you would need to check with them before sharing those creds with anyone else?

[strugee]

Yeah you'd probably need creds to test. I wouldn't mind giving you some if you're interested in working on this but it'll require OSUOSL to issue you credentials.