[VOL-2804]:code changes to support reboot of disabled OLT

Change-Id: I03aa964d6ab8ba203f1a7a73e65331c57dc7e4b7
diff --git a/rw_core/core/device_state_transitions.go b/rw_core/core/device_state_transitions.go
index 5c55b7c..1d98fdd 100644
--- a/rw_core/core/device_state_transitions.go
+++ b/rw_core/core/device_state_transitions.go
@@ -141,11 +141,23 @@
 	transitionMap.transitions = append(transitionMap.transitions,
 		Transition{
 			deviceType:    parent,
+			previousState: DeviceState{Admin: voltha.AdminState_DISABLED, Connection: voltha.ConnectStatus_REACHABLE, Operational: voltha.OperStatus_UNKNOWN},
+			currentState:  DeviceState{Admin: voltha.AdminState_DISABLED, Connection: voltha.ConnectStatus_UNREACHABLE, Operational: voltha.OperStatus_UNKNOWN},
+			handlers:      []TransitionHandler{dMgr.DeleteAllLogicalPorts, dMgr.DeleteLogicalDevice, dMgr.DeleteAllChildDevices, dMgr.DeleteAllDeviceFlows}})
+	transitionMap.transitions = append(transitionMap.transitions,
+		Transition{
+			deviceType:    parent,
 			previousState: DeviceState{Admin: voltha.AdminState_ENABLED, Connection: voltha.ConnectStatus_UNREACHABLE, Operational: voltha.OperStatus_UNKNOWN},
 			currentState:  DeviceState{Admin: voltha.AdminState_ENABLED, Connection: voltha.ConnectStatus_REACHABLE, Operational: voltha.OperStatus_ACTIVE},
 			handlers:      []TransitionHandler{dMgr.CreateLogicalDevice}})
 	transitionMap.transitions = append(transitionMap.transitions,
 		Transition{
+			deviceType:    parent,
+			previousState: DeviceState{Admin: voltha.AdminState_DISABLED, Connection: voltha.ConnectStatus_UNREACHABLE, Operational: voltha.OperStatus_UNKNOWN},
+			currentState:  DeviceState{Admin: voltha.AdminState_DISABLED, Connection: voltha.ConnectStatus_REACHABLE, Operational: voltha.OperStatus_UNKNOWN},
+			handlers:      []TransitionHandler{dMgr.CreateLogicalDevice}})
+	transitionMap.transitions = append(transitionMap.transitions,
+		Transition{
 			deviceType:    child,
 			previousState: DeviceState{Admin: voltha.AdminState_UNKNOWN, Connection: voltha.ConnectStatus_UNKNOWN, Operational: voltha.OperStatus_UNKNOWN},
 			currentState:  DeviceState{Admin: voltha.AdminState_DELETED, Connection: voltha.ConnectStatus_UNKNOWN, Operational: voltha.OperStatus_UNKNOWN},