opentracing-spring-cloud-redis-starter RedisClusterConnection wrapped in TracingRedisConnection

[bivab]

The Redis aspect will wrap all RedisConnection objects returned by the intercepted call in TracingRedisConnection, although Jedis (not sure if Lettuce too) can return RedisClusterConnection from the getConnection call which should be wrapped as TracingRedisClusterConnection.

In spring, using the actuator, this leads to issues with for instance the Redis health indicator that behaves differently for clustered and non-clustered modes.

See this repository for an example: https://github.com/bivab/opentracing-spring-cloud-redis-starter-demo

Including or excluding opentracing-spring-cloud-redis-starter in pom.xml will lead to different results.