Add informational message at the end of health checks. (ExpediaGroup#532

)

- and change its level to DEBUG.

components/proxy/src/main/kotlin/com/hotels/styx/services/HealthCheckMonitoringService.kt

@@ -125,7 +125,11 @@ internal class HealthCheckMonitoringService(
                 .flatMap { it }
                 .collectList()
                 .subscribe {
-                    LOGGER.info("Health Check Completed ..")
+                    val details = it.joinToString(", ") { (name, _, health2) ->
+                        "{ app: $application, host: $name, result: $health2 }"
+                    }
+
+                    LOGGER.debug("Health Check Completed: ${details}")
                 }
     }