Fix parse_cluster_info in RedisCluster.ConfigManager #53
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I came across this problem when trying to use the cluster mode. I realized that the lib wasn't considering the optional fields that can be present in the data returned by the "CLUSTER SHARDS" command (tls-port and hostname), which in the code the info are extracted through a pattern matching operation that when these optional fields are present doesn´t match the expected, leading to lost the data and returning an empty list.
I was able to handle that as seen in the changes but I wasn't able to write the tests successfully. @cabol could you help with the tests if all I said makes any sense?