Upgrade dev dependencies and fix tests to support pytest-asyncio strict mode

tests/compute/vpcs/test_vpcs_vm.py

@@ -16,9 +16,9 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import pytest
+import pytest_asyncio
 import asyncio
 import os
-import sys
 
 from tests.utils import asyncio_patch, AsyncioMagicMock
 from gns3server.utils import parse_version
@@ -30,8 +30,7 @@ from gns3server.compute.vpcs import VPCS
 from gns3server.compute.notification_manager import NotificationManager
 
 
-@pytest.fixture
-@pytest.mark.asyncio
+@pytest_asyncio.fixture
 async def manager(port_manager):
 
     m = VPCS.instance()
@@ -39,8 +38,7 @@ async def manager(port_manager):
     return m
 
 
-@pytest.fixture(scope="function")
-@pytest.mark.asyncio
+@pytest_asyncio.fixture(scope="function")
 async def vm(compute_project, manager, tmpdir, ubridge_path):
 
     vm = VPCSVM("test", "00010203-0405-0607-0809-0a0b0c0d0e0f", compute_project, manager)