Remove migration_status.flag on exit and during initialization; log any exceptions

cli.py

@@ -129,6 +129,7 @@ def exit_programm():
     print("")
     print("Disconnect DB")
     print("logout")
+    os.remove("migration_status.flag")
     print("shutting down")
     time.sleep(0.75)
     os.system('cls' if os.name == 'nt' else 'clear')

main.py

@@ -29,6 +29,10 @@ except Exception as e:
 env = os.environ.copy()
 env["PYTHONIOENCODING"] = "utf-8"
 
+try:
+    os.remove("migration_status.flag")
+except Exception as e:
+    logging.info(e)
 #migration
 def run_migration():
     global migration_done
@@ -58,9 +62,6 @@ cli_process = subprocess.Popen([sys.executable, "cli.py"])
 api_process.wait()
 cli_process.wait()
 
-time.sleep(60)
-os.remove("migration_status.flag")
-
 # automatic durataion validation check
 while True:
     time.sleep(300)