Introduce adaptive trigger event

[mp911de]

Feature Request

RedisClusterClient should emit an event via EventBus if an adaptive refresh is triggered so adaptive triggers can be used outside of the client itself to perform an e.g. delayed topology refresh.

Is your feature request related to a problem? Please describe

See #672, in which topology updates are performed later than the adaptive trigger is consumed (Lettuce is updating faster the topology than Redis is performing the topology change).

Describe the solution you'd like

A clear and concise description of what you want to happen. Add any considered drawbacks.

Describe alternatives you've considered

Introducing delays but that doesn't seem to be a good fit as it introduces another layer of guesswork.

[mp911de]

That's implemented now.

[SushmaReddyLoka]

How can one delay topology refresh by subscribing to this event ? Because the refresh is already done and then the event is published right ? Are we expecting to reloadpartitions again () as part of this event , probably by scheduling the reloadparitions() for some time in future ?