Add ClickHouse balancer fault tolerance

[xtreding]

Problem

At present EventNative supports multi-hosts ClickHouse configuration. There is load balancing between instances but if a connection error occurred, data will be stored into fallback. As several ClickHouse instances configured EventNative should support fault tolerance.

Solution

EventNative ClickHouse connector should be fault tolerance and retry the operation with another ClickHouse instance on connection errors.