Update the OSSN-0085 note
Update the OSSN-0085 note

Update existing node in the RBD connector about the removal of the
keyring data in the connection info to note that the code should not be
removed, since it is used by cinderlib.

Related-Bug: #738216
Change-Id: I1f76045b677833bb155978e1a166e63d53dc2aba

openstack/os-brick,openstack/os-brick