Make absolutely sure the scheduler doesn't run, remove convoluted code

mayan/apps/scheduler/__init__.py

@@ -2,13 +2,12 @@ from __future__ import absolute_import
 
 import atexit
 import logging
-import sys
 
 from project_tools.api import register_tool
 
 from .links import job_list
-from .literals import SHUTDOWN_COMMANDS
-from .runtime import scheduler, lockdown
+from .runtime import scheduler
+import logging
 
 logger = logging.getLogger(__name__)
 
@@ -18,13 +17,5 @@ def schedule_shutdown_on_exit():
     scheduler.shutdown()
 
 
-if any([command in sys.argv for command in SHUTDOWN_COMMANDS]):
-    logger.debug('Scheduler shut down on SHUTDOWN_COMMAND')
-    # Shutdown any scheduler already running
-    scheduler.shutdown()
-    # Prevent any new scheduler afterwards to start
-    lockdown()
-
-
 atexit.register(schedule_shutdown_on_exit)
 register_tool(job_list)

mayan/apps/scheduler/runtime.py

@@ -1,13 +1,17 @@
+from __future__ import absolute_import
+
+import sys
+import logging
+
 from apscheduler.scheduler import Scheduler
 
-_lockdown = False
+from .literals import SHUTDOWN_COMMANDS
+
+logger = logging.getLogger(__name__)
 scheduler = Scheduler()
 
-
-def lockdown():
-    global _lockdown
-    _lockdown = True
-
-
-if not _lockdown:
+if not any([command in sys.argv for command in SHUTDOWN_COMMANDS]):
+    logger.debug('Starting scheduler')
     scheduler.start()
+
+