rbd : use keyring file instead keyfile
rbd : use keyring file instead keyfile

we need 1 keyring by rbd storage

/etc/pve/priv/ceph/storagename.keyring

Signed-off-by: Alexandre Derumier <13185937915d179747cf9ef6fd2470b99fe66123@odiso.com>

odiso/proxmox-pve-storage-netapp