Integration of TE component

Integration of TE component, documentation, and test cases

src/te/apps/tfte/src/tfte_topology.erl

@@ -281,18 +281,23 @@ device_status(#{device_operational_status := 'DEVICEOPERATIONALSTATUS_ENABLED'})
     enabled.
 
 device_mpls_label(Device) ->
-    try device_config_value(<<"/te_data/mpls_label">>, Device)
+    try device_config_value(<<"/te_data">>, Device) of
+        Map when is_map(Map) -> maps:get(<<"mpls_label">>, Map, undefined);
+        _ -> undefined
     catch error:badarg -> undefined
     end.
 
 device_pcc_address(Device) ->
-    try device_config_value(<<"/te_data/pcc_address">>, Device) of
-        undefined -> undefined;
-        AddressBin ->
-            case inet_parse:address(binary_to_list(AddressBin)) of
-                {ok, Address} -> Address;
-                {error,einval} -> undefined
-            end
+    try device_config_value(<<"/te_data">>, Device) of
+        Map when is_map(Map) ->
+            case maps:get(<<"pcc_address">>, Map, undefined) of
+                AddressBin ->
+                    case inet_parse:address(binary_to_list(AddressBin)) of
+                        {ok, Address} -> Address;
+                        {error,einval} -> undefined
+                    end
+            end;
+        _ -> undefined
     catch
         error:badarg -> undefined
     end.