This bug was introduced by below commit
The update after PATCH SET 10 will cause the second mariadb could not
join cluster. In this case, could not set bind_address=:: for ipv4. It
only works for ipv6.
As for conf.database.config_override, we can override it through
system helm-override-update command, but could not use python
plugin to dynamically override it as it will introduce a "-|" line
in first line of config file.
A user override for conf.database.config_override might break the IPv6
system overrides, it need including ipv6 config for ipv6 case as well.
Test pass on duplex setup. Openstack application applied successfully.
Signed-off-by: Zhipeng Liu <email@example.com>