Fix transitions for image_download and activation

Change-Id: I713ada52eef9d275c7d7596026e178c7382e8335
diff --git a/rw_core/core/device/state/transitions_test.go b/rw_core/core/device/state/transitions_test.go
index 4ad3f49..cc1aa6d 100644
--- a/rw_core/core/device/state/transitions_test.go
+++ b/rw_core/core/device/state/transitions_test.go
@@ -348,6 +348,14 @@
 	previousDevice = getDevice(false, voltha.AdminState_PREPROVISIONED, voltha.ConnectStatus_REACHABLE, voltha.OperStatus_DISCOVERED)
 	device = getDevice(false, voltha.AdminState_PREPROVISIONED, voltha.ConnectStatus_REACHABLE, voltha.OperStatus_ACTIVATING)
 	assertNoOpTransition(t, device, previousDevice)
+
+	previousDevice = getDevice(false, voltha.AdminState_ENABLED, voltha.ConnectStatus_REACHABLE, voltha.OperStatus_UNKNOWN)
+	device = getDevice(false, voltha.AdminState_DOWNLOADING_IMAGE, voltha.ConnectStatus_REACHABLE, voltha.OperStatus_UNKNOWN)
+	assertNoOpTransition(t, device, previousDevice)
+
+	previousDevice = getDevice(false, voltha.AdminState_DOWNLOADING_IMAGE, voltha.ConnectStatus_REACHABLE, voltha.OperStatus_UNKNOWN)
+	device = getDevice(false, voltha.AdminState_ENABLED, voltha.ConnectStatus_REACHABLE, voltha.OperStatus_UNKNOWN)
+	assertNoOpTransition(t, device, previousDevice)
 }
 
 func TestMatch(t *testing.T) {