Add client connectivity logging property [HZ-4734] (#1123)

Adds reference docs for new client property
`hazelcast.client.connectivity.logging.delay.seconds`

Mono PR: hazelcast/hazelcast-mono#2151

docs/modules/clients/pages/java.adoc

@@ -2627,6 +2627,15 @@ increased performance and reduced memory usage.
 to the same member when this property is `true`. When it is set to `false`,
 the client tries to connect to the members in the given order.
 
+|`hazelcast.client.connectivity.logging.delay.seconds`
+|10
+|int
+|Delay in seconds after which the client logs connectivity statistics after member connection changes.
+If a member connection state changes before the delay period has elapsed, the delay is reset.
+The delay reduces noise from frequent connection updates that
+can occur in bursts. Note that only the last connectivity view will be
+logged when the task is run after this delay.
+
 |`hazelcast.client.statistics.enabled`
 |false
 |bool