Add cinder volume instancelocality filter test

The patch adds cinder API test to check that  instance locality filter
does works as intended.
Test is enabled by setting new config option
`instance_locality_enabled` in the `volume-feature-enabled` group
to True (default is False, test is disabled).

Change-Id: Ibd7f799aae99e1b8c032fc06b70ffe3f61b86b09
Related-Prod: PRODX-13484
(cherry picked from commit 6d741a65abe58b2b8e2a4bfd20986cbf98147282)
(cherry picked from commit 873d1433c34fab9f3f037de60716f84e49ff36ce)
(cherry picked from commit 548fd17b015dc48026f6e572c01fd57a3c4a7779)
3 files changed