Migrating to Python v3

 - support for Python v3.8.x
 - support for Python v3.5.x
 - new tag, 2019.2.8
 - updates class generation and iterators
 - unittests updated with coverage >75%
 - new coverage routines
 - unittests profiling
 - full fake data for unittests
 - unittest testrun is ~1.5 seconds long

Bugfixes
 - 34834, proper use of 'sudo' option
 - multiple proper iterator use
 - 37919, show warning when installed and candidate versions
   are newer comparing to release version

Change-Id: Idd6b889f7ce94ae0c832e2f0a0346e4fdc3264a3
Related-PROD: PROD-34834 PROD-34664 PROD-34919
diff --git a/cfg_checker/cfg_check.py b/cfg_checker/cfg_check.py
index 1a2d79f..5c986a2 100644
--- a/cfg_checker/cfg_check.py
+++ b/cfg_checker/cfg_check.py
@@ -47,7 +47,7 @@
         args, unknown = parser.parse_known_args()
     except TypeError:
         logger_cli.info("\n# Please, check arguments")
-        sys.exit(0)
+        sys.exit(1)
 
     if unknown:
         logger_cli.error(