fix(links): reserve ports on add, accept port name and auto, add port_in_use code

gns3server/controller/ports/port.py

@@ -41,6 +41,10 @@ class Port:
     def link(self, val):
         self._link = val
 
+    @property
+    def name(self):
+        return self._name
+
     @property
     def adapter_number(self):
         return self._adapter_number