[NetApp] Driver failes while checking if kerberos is enabled

[Carlos Eduardo]

Description
===========
While creating new access rules, the NetApp ONTAP driver in DHSS=False mode fails while checking if kerberos is enabled for the given vserver/svm. This issue happens when using svm scoped accounts.

Steps to reproduce
==================

- Deploy manila, add a NetApp DHSS=False backend with svm scoped account credentials.
- Create a new share type
- Create a new share
- Attempt to create a new access rule for the given share.

Expected result
===============
Access rule should be created.

Actual result
=============
Creation of the access rule fails and an exception is thrown [1].

Environment
===========
This issue should show up starting from the Wallaby release.

Logs & Configs
==============
[1] https://paste.opendev.org/show/bAQKE9imowgUA5aWC76M/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/manila/+/922768

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Carlos Eduardo <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/manila/+/922768
Reason: Abandoning in favor of: https://review.opendev.org/c/openstack/manila/+/922808