[automatic failover] Follow up items regarding to feedbacks and potential issues

[atakavci]

The list of items to be completed on feature branch before merging to master.

• Tests on EchoStrategy are to be included in the feature branch, suggestion here. Fixed here
• Connection.forceDisconnect should also set the connection as broken ( closeQuietly ??) , reference to line. Fixed here

[atakavci]

• [automatic failover] Replace 'SimpleEntry' with 'HealthCheckResult' #4236