Storwize: delete_group_snapshot doesn't handle flash copy consistency group cleanup.

[katari manoj kumar]

Storwize: delete_group_snapshot doesn't handle flash copy consistency group cleanup properly.

In case of multiple snapshots in the group,existing code exits if any one snapshot deletion fails, but it should update error state and continue with deletin other snapshots.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/744652

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/744652
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=933a833b8d0138dae50a1b19095dd77a2a5cd55b
Submitter: Zuul
Branch: master

commit 933a833b8d0138dae50a1b19095dd77a2a5cd55b
Author: katarimanojkumar <email address hidden>
Date: Tue Aug 4 06:49:14 2020 +0000

    [Storwize]:Fix delete_group_snapshot cleanup issue

    delete_group_snapshot doesn't handle flash copy consistency
    group cleanup properly.
    In case of multiple snapshots in the group,existing code exits
    if any one snapshot deletion fails, but it should update error
    state and continue with deleting other snapshots.

    closes bug: #1890241

    Change-Id: I87c9f35f34c94bff3ada7d428cd963fc8703a2ad