Remove MANILA_MULTI_BACKEND from devstack script

[Victoria Martinez de la Cruz]

MANILA_MULTI_BACKEND has been deprecated for five years now, we should remove it from our code base.

[Vida Haririan (vhariria)]

Additional comments http://eavesdrop.openstack.org/meetings/manila/2020/manila.2020-10-15-15.02.log.html

[Lívia Cavalcanti (liviacavalcanti)]

Hi! Checking the settings script, I figured out that there are some variables also deprecated just like MANILA_MULTI_BACKEND. Some of them are MANILA_BACKEND1_CONFIG_GROUP_NAME and MANILA_SHARE_BACKEND1_NAME.
As they are related to the same context of MANILA_MULTI_BACKEND, I am wondering if I should address their removal in the same PR of this issue.
Can anyone tell me if this bug should exclusively exclude MANILA_MULTI_BACKEND?

[Tom Barron (tpb)]

If they are related to the same context then it likely makes sense to include them with this patch, mentioning that in the commit message. If you see unrelated deprecated variables that should be removed, a separate patch is best so that the separate concerns can be reviewed separately.

[Goutham Pacha Ravi (gouthamr)]

Patch in progress: https://review.opendev.org/758674/

[Goutham Pacha Ravi (gouthamr)]

Fixed in: https://review.opendev.org/758674/

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/manila 12.0.0.0rc1 release candidate.