LCORE-643: don't store None value in boolean CLI option

Author: tisnik

src/lightspeed_stack.py

@@ -31,15 +31,15 @@ def create_argument_parser() -> ArgumentParser:
         dest="verbose",
         help="make it verbose",
         action="store_true",
-        default=None,
+        default=False,
     )
     parser.add_argument(
         "-d",
         "--dump-configuration",
         dest="dump_configuration",
         help="dump actual configuration into JSON file and quit",
         action="store_true",
-        default=None,
+        default=False,
     )
     parser.add_argument(
         "-c",