fix: Only import deviceaccess where needed

Otherwise the whole config generator depends on it without any real reason

ConfigGenerator/TestEnv.py

@@ -18,7 +18,6 @@ from .ExternalTools import RSync
 from .Command import AbstractCommand
 import json
 import subprocess
-import deviceaccess
 import ctypes
 import time
 import xml.dom.minidom as xmlmini
@@ -197,6 +196,7 @@ class _TestEnvCommand(AbstractCommand):
                             f"Server not yet available after {i * sleep_time_between_tries} seconds. Limit: {time_limit_in_s}")
                     try:
                         with HideOutput():  # to reduce spam from fail-messages from doocs lib
+                            import deviceaccess
 
                             d = deviceaccess.Device(f"(doocs:{doocs_address})")
                             d.open()