Backport: Remove timeout to wait for connections to finish.

gns3server/server.py

@@ -85,7 +85,7 @@ class Server:
         """
 
         if self._handler:
-            yield from self._handler.finish_connections(1.0)
+            yield from self._handler.finish_connections()
             self._handler = None
 
         for module in MODULES:
@@ -253,6 +253,6 @@ class Server:
             log.warning("TypeError exception in the loop {}".format(e))
         finally:
             if self._handler:
-                self._loop.run_until_complete(self._handler.finish_connections(1.0))
+                self._loop.run_until_complete(self._handler.finish_connections())
             server.close()
             self._loop.run_until_complete(app.finish())