Fix tests

(cherry picked from commit 2ba6eac113)

tests/compute/qemu/test_qemu_vm.py

@@ -337,6 +337,7 @@ def test_set_qemu_path_kvm_binary(vm, fake_qemu_binary):
 
 async def test_set_platform(compute_project, manager):
 
+    manager.config_disk = None  # avoids conflict with config.img support
     with patch("shutil.which", return_value="/bin/qemu-system-x86_64") as which_mock:
         with patch("gns3server.compute.qemu.QemuVM._check_qemu_path"):
             vm = QemuVM("test", "00010203-0405-0607-0809-0a0b0c0d0e0f", compute_project, manager, platform="x86_64")

tests/compute/test_manager.py

@@ -18,7 +18,7 @@
 import uuid
 import os
 import pytest
-from unittest.mock import patch
+from unittest.mock import patch, MagicMock
 from tests.utils import asyncio_patch
 
 from gns3server.compute.vpcs import VPCS
@@ -41,6 +41,7 @@ async def vpcs(loop, port_manager):
 async def qemu(loop, port_manager):
 
     Qemu._instance = None
+    Qemu._init_config_disk = MagicMock()  # do not create the config.img image
     qemu = Qemu.instance()
     qemu.port_manager = port_manager
     return qemu