ceph: show error even in silent curl
ceph: show error even in silent curl

The --silent option will remove the progress bar of the curl but also
silence any errors of stderr, so adding --show-error will display the
error even if --silent is used.

Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

rook/nfs,rook/rook,rook/rook,rook/nfs,rook/rook,rook/nfs,rook/rook,rook/rook