With https://github.com/ceph/ceph-container/pull/1529, we now build
vX.X.X version so we don't need to have the timestamp. Also we will
automatically get the last changes from the OS/packages too more
frequently.

Closes: https://github.com/rook/rook/issues/4414

Signed-off-by: Sébastien Han <seb@redhat.com>