[VOL-2404] : RW-Core changes for handling OLT Reboot Scenario

- When the OLT's connection status goes from REACHABLE to UNREACHABLE
  in ENABLED/DISABLED admin state, delete all the logical ports,
  child devices, logical device and device flows.

- When OLT's connection status becomes reachable again, child devices,
  ports will be re-discovered again. The logical device will be recreated
  again.

- Will not handle the case where OLT goes UNREACHABLE when OLT is disabled
  as part of voltha2.3 release

Change-Id: I34c0c538b44afa19e889e9631f0a738060a58fef
diff --git a/rw_core/core/logical_device_manager.go b/rw_core/core/logical_device_manager.go
index df11ac4..1859784 100644
--- a/rw_core/core/logical_device_manager.go
+++ b/rw_core/core/logical_device_manager.go
@@ -495,7 +495,7 @@
 		return err
 	}
 	if agent := ldMgr.getLogicalDeviceAgent(ctx, *ldID); agent != nil {
-		if err := agent.deleteAllLogicalPorts(ctx, device); err != nil {
+		if err := agent.deleteAllLogicalPorts(ctx); err != nil {
 			return err
 		}
 	}