Comment 3 for bug 1837107

Reviewed: https://review.opendev.org/672203
Committed: https://git.openstack.org/cgit/starlingx/config/commit/?id=942d3331cc1db071c10624cba1688f83933eb986
Submitter: Zuul
Branch: master

commit 942d3331cc1db071c10624cba1688f83933eb986
Author: Liang Fang <email address hidden>
Date: Sun Jul 21 14:41:42 2019 +0800

    Enable cinder raw cache by default

    Support to enable cinder raw cache feature was added to openstack helm
    by https://review.opendev.org/#/c/647493/. This patch is to enable this
    feature in Starlingx by default.

    Refer to cinder raw cache feature:
    https://docs.openstack.org/cinder/latest/admin/blockstorage-image-volume-cache.html

    Closes-Bug: #1837107
    Change-Id: I5277063a7a924b1791f00d27921d2267b52acb7d
    Signed-off-by: Liang Fang <email address hidden>