Not all state transitions are written to the log

Some monitor state transitions are not written to the log when log_info is enabled.

E.g. a binlog routers transition from Binlog Relay, Running to Down is logged when it is on another maxscale instance and that one is being shut down, but when doing a STOP SLAVE on a binlog router causing a transition from Binlog Relay, Running to just Running this is not directly seen in the maxscale log at all.

What is seen though is actual slaves replicating form that binlog router loosing their master and switching from Slave; Running to just Running due to this.

Seeing that the binlog router changed state at around the same time would make understanding the state changes of the actual replicas more understandable when analyzing logs.