onevm saveas should check VM consistency
|Assignee:||Daniel Molina||% Done:|
There is some room for improvement in save as:
1.- Roll back: If for any reason the saveas method fails in the core the image has to be deleted
2.- Persistent images already uses saveas. CLI should not allow to saveas a persistent image as it is going to be saveas already
3.- If a VM has been marked as to be savedas subsequent calls to saveas should fail at the API level.