Fix test suite after VPCS changes for using ubridge

gns3server/compute/vpcs/vpcs_vm.py

@@ -108,6 +108,9 @@ class VPCSVM(BaseNode):
         if not path:
             raise VPCSError("No path to a VPCS executable has been set")
 
+        # This raise an error if ubridge is not available
+        ubridge_path = self.ubridge_path
+
         if not os.path.isfile(path):
             raise VPCSError("VPCS program '{}' is not accessible".format(path))
 

gns3server/handlers/api/controller/drawing_handler.py

@@ -104,4 +104,3 @@ class DrawingHandler:
         project = controller.get_project(request.match_info["project_id"])
         yield from project.delete_drawing(request.match_info["drawing_id"])
         response.set_status(204)
-