Can't update empty volumeSource to use emptyDir

[dmage]

The operator doesn't allow to change configuration from

  storage:
    filesystem: {}

to

  storage:
    filesystem:
      volumeSource:
        emptyDir: {}

because storage type change is not supported: expected storage type filesystem, but got emptydir.

/kind bug

[bparees]

I think for now we need to remove the logic that prevents storage changes.

we can discuss it on scrum or elsewhere, but i'm coming to the conclusion that trying to block storage changes is going to be too painful in light of the need for users to potentially tweak settings like adding cloudfront to s3, or us generally getting storage wrong.

i'd rather start w/ it being allowed and in the future when we have more time we can figure out how to put sensible restrictions in place along with a proper way for users to get around those restrictions.