[BUG] keep redis connection alive

According to Azure documentation, Azure cache instance set the timeout as 10 minutes. It will RESET the connection once the connection idles for 10 minutes, so which may create client problem. (Refer to 6. Idle connections from https://techcommunity.microsoft.com/t5/azure-paas-blog/azure-redis-timeouts-client-side-issues/ba-p/2022203#:~:text=Azure%20Cache%20for%20Redis%20service,side%20and%20cannot%20be%20changed.))

As the suggestion from the documentation, we config redisson keepALive setting as true which is false by default.