Use root-enable in redis to enable authentication

Root-enable and root-disable are two common commands in Trove to enable/disable root for database like mysql. But when we come to redis, it seems that we can only enable/disable authentication by using configuration group because there is no root-enable/root-disable implementation in redis.

I would like to implement a bp that using root-enable/root-disable to enable/disable authentication in redis. This patch should support:

1. enable/disable authentication for single redis instance;
2. enable/disable authentication for replica instances. For example, when we create a replica instance of a exist single redis instance, and then we do root-enable in master node, the slave node should be also enabled authentication. When we have single redis instance which has already authentication enabled, then we create a replica instance of it, the replica instance has enabled authentication which I have tested in trove version newton. So in this patch, we won't discuss about this scenario.

But here we have another problem, what if we do root-enable to enable authentication and then the customer removes it by using configuration group? I think we should discuss about it. My advice is that we can remove requirepass item in validation-rules.json of redis, that means we do not support requirepass in redis configuration group, or we should pay attention to remove RootHistory by disabling authentication in redis via configuration group.