PowerFlex driver does not correctly handle size of a cloned/created from snapshot volume

[Ivan Pchelintsev]

Dell EMC PowerFlex only supports volumes with size divisible by 8.
PowerFlex driver reported the wrong (not rounded) size of volumes created from snapshot or cloned.
However, on the storage side volume size was correctly rounded.
+--------------------------------------+-----------+------+------+-------------+----------+-------------+
| ID | Status | Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+------+------+-------------+----------+-------------+
| f9cac353-672c-42e2-9783-59f9c6fa571d | available | vol1 | 8 | powerflex1 | false | |
+--------------------------------------+-----------+------+------+-------------+----------+-------------+

$ cinder extend f9cac353-672c-42e2-9783-59f9c6fa571d 13

+--------------------------------------+-----------+------+------+-------------+----------+-------------+
| ID | Status | Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+------+------+-------------+----------+-------------+
| f9cac353-672c-42e2-9783-59f9c6fa571d | available | vol1 | 13 | powerflex1 | false | |
+--------------------------------------+-----------+------+------+-------------+----------+-------------+

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/cinder/+/800022

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Ivan Pchelintsev <email address hidden>" on branch: master
Review: https://review.opendev.org/c/openstack/cinder/+/800022