Extract 'memcache_security_strategy' to all.yml

[Yang Youseok]

By default, 'memcache_security_strategy' is located in every *.conf.j2.

I think for environment which does not have memcache_strategy, it's better to have 'memcache_security_strategy' variable in all.yml

[Mark Goddard (mgoddard)]

It's a mini-feature, but happy to accept a change.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/kolla-ansible/+/925444

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/kolla-ansible/+/925444
Committed: https://opendev.org/openstack/kolla-ansible/commit/15140d532de0aa1feab8850c2d7befd87c11b639
Submitter: "Zuul (22348)"
Branch: master

commit 15140d532de0aa1feab8850c2d7befd87c11b639
Author: Roman Krček <email address hidden>
Date: Thu Aug 1 08:39:48 2024 +0200

    Put memcache_security_strategy in single place at all.yml

    For possible config options see docs
    https://docs.openstack.org/keystonemiddleware/latest/middlewarearchitecture.html#memcache-protection

    Closes-bug: #1850733
    Signed-off-by: Roman Krček <email address hidden>
    Change-Id: I169e27899f7350f5eb8adb1f81a062c51e6cbdfc