When creating a cluster using a config file, provide the ability to skip nodegroup creation

[palemtnrider]

Why do you want this feature?
I want the ability to selectively create nodegroups using the same configuration file I use to create my cluster at a later time.

What feature/behavior/change do you want?
--without-nodegroup skips initial nodegroup creation but I need the ability to skip all nodegroups in my configuration file.

[D3nn]

Looks like this one was done in PR #406. Closing.

[errordeveloper]

Yes, looking at #406 now, I think it's actually sufficient to begin with. We can add a filter flag later.

[D3nn]

Found an issue where the node groups are being created. Re-opening.