NetApp E-series: Do not log passwords in requests

Previously, requests to the backend that contained passwords were
not scrubbed prior to logging.

Closes-bug: 1383444

Change-Id: I389d5115e4a6ffbae6f0463a62015f6ac01ec2e9
(cherry picked from commit: fdaf96621c011e1d0ee2666f8f547d47057f72d0)
Merge "NetApp E-series: Do not log passwords in requests" into stable/juno