Nautilus has an issue targeting Luminous when running the rbd info command.
Rook already has the info it needs for the call and can return it
after the rbd create command succeeds.
Signed-off-by: travisn <tnielsen@redhat.com>
Current code will truncate the generated RBD image in some cases,
this PR will round up the size to make sure the final RBD image
generated can cover all the required data space.
Also, corresponding unit test cases added to verify the change.
Signed-off-by: Dennis Chen <dennis.chen@arm.com>