We need to explicitly assign the ceph version within each scope since
one function returns a pointer and one is not.
Previously, the `desiredCephVersion` was recreated in the scope of the
`else` and thus a new variable `desiredCephVersion` was initialized (see
the `:=`).
Now, each scope creates and assign to clusterInfo a `desiredCephVersion`
value.
Signed-off-by: Sébastien Han <seb@redhat.com>