Addon-Manager: [skip ci] get rid of some explicit PySide2 imports

src/Mod/AddonManager/AddonManagerTest/gui/test_workers_startup.py

@@ -29,7 +29,7 @@ import tempfile
 
 import FreeCAD
 
-from PySide2 import QtCore
+from PySide import QtCore
 
 import NetworkManager
 from Addon import Addon

src/Mod/AddonManager/AddonManagerTest/gui/test_workers_utility.py

@@ -26,7 +26,7 @@ import unittest
 import os
 import FreeCAD
 from addonmanager_workers_utility import ConnectionChecker
-from PySide2 import QtCore
+from PySide import QtCore
 
 import NetworkManager