Fix transitions for image_download and activation

Change-Id: I713ada52eef9d275c7d7596026e178c7382e8335
diff --git a/rw_core/core/device/state/transitions.go b/rw_core/core/device/state/transitions.go
index eb8f033..f4b442c 100644
--- a/rw_core/core/device/state/transitions.go
+++ b/rw_core/core/device/state/transitions.go
@@ -230,6 +230,18 @@
 			handlers:      []transitionHandler{dMgr.NotifyInvalidTransition}})
 	transitionMap.transitions = append(transitionMap.transitions,
 		transition{
+			deviceType:    child,
+			previousState: deviceState{Admin: voltha.AdminState_ENABLED, Connection: voltha.ConnectStatus_REACHABLE, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_NONE},
+			currentState:  deviceState{Admin: voltha.AdminState_DOWNLOADING_IMAGE, Connection: voltha.ConnectStatus_REACHABLE, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_NONE},
+			handlers:      []transitionHandler{}})
+	transitionMap.transitions = append(transitionMap.transitions,
+		transition{
+			deviceType:    child,
+			previousState: deviceState{Admin: voltha.AdminState_DOWNLOADING_IMAGE, Connection: voltha.ConnectStatus_REACHABLE, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_NONE},
+			currentState:  deviceState{Admin: voltha.AdminState_ENABLED, Connection: voltha.ConnectStatus_REACHABLE, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_NONE},
+			handlers:      []transitionHandler{}})
+	transitionMap.transitions = append(transitionMap.transitions,
+		transition{
 			deviceType:    any,
 			previousState: deviceState{Admin: voltha.AdminState_ENABLED, Connection: voltha.ConnectStatus_UNKNOWN, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_NONE},
 			currentState:  deviceState{Admin: voltha.AdminState_UNKNOWN, Connection: voltha.ConnectStatus_UNKNOWN, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_NONE},