share export location not updated with netapp driver

[Sylvan Le Deunff]

Description
===========
When adding a subnet to a share network that is used by a share, the list of export path of this share is not updated. This bug is specific to NetApp multi SVM driver.

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

A chronological list of steps which will help reproduce the issue you hit:
* Configure manila to use NetApp drv_multi_svm share driver with option driver_handle_share_server=true
* Create a share network (this automatically create a default share network subnet)
* Create a share using this share network
* Create a share network subnet check
* Add a second subnet to this share network

Expected result
===============
The list of share's export paths should now contains 2 export paths, 1 in each subnet.

Actual result
=============
Export path list is not updated when the second subnet is created.

This is due to the following check: https://github.com/openstack/manila/blob/master/manila/share/drivers/netapp/dataontap/cluster_mode/lib_multi_svm.py#L2306

[Carlos Eduardo (silvacarlose)]

Hello, Sylvan! Thank you for the bug report. I see you have assigned yourself to this bug. Are you working on a fix? If not, we can ask the NetApp driver maintainers to take a look at this bug.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/manila/+/882130

[Sylvan Le Deunff (sylvanld)]

Hello, Carlos! Yes I just managed to submit the fix. It consists in removing the condition that seems needless.