e2e: Use utilEncryptionType instead of string in rbd suite
e2e: Use utilEncryptionType instead of string in rbd suite

Signed-off-by: Marcel Lauhoff <71ffe8e889bf8a669a25bf46f8e88e7fab585e83@suse.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi