[VOL-4445] Correct error type to proceed with deletion with half route

Also moving deletion of logical device and meters to correct place in transitions.go

Change-Id: I9eee03edba9ae47ec09fc3b752082a740ee0efde
diff --git a/rw_core/core/device/state/transitions.go b/rw_core/core/device/state/transitions.go
index 7a28a83..55b7b59 100644
--- a/rw_core/core/device/state/transitions.go
+++ b/rw_core/core/device/state/transitions.go
@@ -158,13 +158,13 @@
 			deviceType:    parent,
 			previousState: deviceState{Admin: voltha.AdminState_UNKNOWN, Connection: voltha.ConnectStatus_UNKNOWN, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_ANY},
 			currentState:  deviceState{Admin: voltha.AdminState_UNKNOWN, Connection: voltha.ConnectStatus_UNKNOWN, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_FORCE_DELETING},
-			handlers:      []transitionHandler{dMgr.DeleteAllLogicalPorts, dMgr.DeleteAllLogicalMeters, dMgr.DeleteAllChildDevices, dMgr.DeleteLogicalDevice, dMgr.RunPostDeviceDelete}})
+			handlers:      []transitionHandler{dMgr.DeleteAllLogicalPorts, dMgr.DeleteAllChildDevices, dMgr.DeleteAllLogicalMeters, dMgr.RunPostDeviceDelete}})
 	transitionMap.transitions = append(transitionMap.transitions,
 		transition{ //DELETE device after adapter response
 			deviceType:    parent,
 			previousState: deviceState{Admin: voltha.AdminState_UNKNOWN, Connection: voltha.ConnectStatus_UNKNOWN, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_ANY},
 			currentState:  deviceState{Admin: voltha.AdminState_UNKNOWN, Connection: voltha.ConnectStatus_UNKNOWN, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_DELETING_POST_ADAPTER_RESPONSE},
-			handlers:      []transitionHandler{dMgr.DeleteAllLogicalPorts, dMgr.DeleteAllLogicalMeters, dMgr.DeleteAllChildDevices, dMgr.DeleteLogicalDevice, dMgr.RunPostDeviceDelete}})
+			handlers:      []transitionHandler{dMgr.DeleteAllLogicalPorts, dMgr.DeleteAllChildDevices, dMgr.DeleteAllLogicalMeters, dMgr.RunPostDeviceDelete}})
 	transitionMap.transitions = append(transitionMap.transitions,
 		transition{ //DELETE no operation transition
 			deviceType:    parent,
@@ -176,13 +176,13 @@
 			deviceType:    parent,
 			previousState: deviceState{Admin: voltha.AdminState_ENABLED, Connection: voltha.ConnectStatus_REACHABLE, Operational: voltha.OperStatus_ACTIVE, Transient: voltha.DeviceTransientState_NONE},
 			currentState:  deviceState{Admin: voltha.AdminState_ENABLED, Connection: voltha.ConnectStatus_UNREACHABLE, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_NONE},
-			handlers:      []transitionHandler{dMgr.DeleteAllLogicalPorts, dMgr.DeleteAllLogicalMeters, dMgr.DeleteAllChildDevices, dMgr.DeleteLogicalDevice, dMgr.DeleteAllDeviceFlows}})
+			handlers:      []transitionHandler{dMgr.DeleteAllLogicalPorts, dMgr.DeleteAllChildDevices, dMgr.DeleteAllLogicalMeters, dMgr.DeleteLogicalDevice, dMgr.DeleteAllDeviceFlows}})
 	transitionMap.transitions = append(transitionMap.transitions,
 		transition{
 			deviceType:    parent,
 			previousState: deviceState{Admin: voltha.AdminState_DISABLED, Connection: voltha.ConnectStatus_REACHABLE, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_NONE},
 			currentState:  deviceState{Admin: voltha.AdminState_DISABLED, Connection: voltha.ConnectStatus_UNREACHABLE, Operational: voltha.OperStatus_UNKNOWN, Transient: voltha.DeviceTransientState_NONE},
-			handlers:      []transitionHandler{dMgr.DeleteAllLogicalPorts, dMgr.DeleteAllLogicalMeters, dMgr.DeleteAllChildDevices, dMgr.DeleteLogicalDevice, dMgr.DeleteAllDeviceFlows}})
+			handlers:      []transitionHandler{dMgr.DeleteAllLogicalPorts, dMgr.DeleteAllChildDevices, dMgr.DeleteAllLogicalMeters, dMgr.DeleteLogicalDevice, dMgr.DeleteAllDeviceFlows}})
 	transitionMap.transitions = append(transitionMap.transitions,
 		transition{
 			deviceType:    parent,