Fix ConnectionWrapper with aggregated connections

[specdrum-agc]

Fixes predis/predis#777

[ostrolucky]

Sorry, I have tested this, but it doesn't solve described issue. Try this configuration

snc_redis:
        predis:
            type: predis
            alias: predis
            dsn:
                - redis://127.0.0.1:9999
                - redis://127.0.0.1:6379
            options:
                cluster: redis

then execute any command via bin/console redis:query --client=predis. With this patch, you will still get

In ConnectionWrapper.php line 169:

  Connection refused [tcp://127.0.0.1:9999]

Once the config is switched from predis to phpredis, it works correclty then and it fails over to next redis node.

[specdrum-agc]

My bad, I passed wrong object to the exception.

[ostrolucky]

Great, this one is working, thx. I'll release now