Use the Credentials.ID in combination with the keyfile to connect to the
Ceph cluster. This makes it possible to use different users for
different tasks on the cluster.
Fixes: #904
Signed-off-by: Niels de Vos <ndevos@redhat.com>
By using the ConnPool it is not needed to re-connect every time to the
Ceph cluster when (rbd) operations are executed through the go-ceph/rbd
API.
Signed-off-by: Niels de Vos <ndevos@redhat.com>