Fix backup projects and a qemu broken tests

gns3server/handlers/upload_handler.py

@@ -104,6 +104,15 @@ class UploadHandler:
     def backup_images(request, response):
         yield from UploadHandler._backup_directory(request, response, UploadHandler.image_directory())
 
+    @classmethod
+    @Route.get(
+        r"/backup/projects.tar",
+        description="Backup GNS3 projects",
+        api_version=None
+    )
+    def backup_projects(request, response):
+        yield from UploadHandler._backup_directory(request, response, UploadHandler.project_directory())
+
     @staticmethod
     def _restore_directory(file, directory):
         """