VMAX Support for listing manageable volumes and snapshots. Change-Id: I73cf7940fbeb4a450fd0719a5477c82aefde8c9a Implements: blueprint vmax-list-manage-existing
Release notes
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A release note is required if the patch has upgrade or API impact. It is also required if the patch adds a feature or fixes a long-standing or security bug.
Please see https://docs.openstack.org/cinder/latest/contributor/releasenotes.html for more details.