Fix lint findings

Signed-off-by: Ansgar Schmidt <ansgar.schmidt@gmx.net>
1 job for add-max-duration-parameter in 56 seconds (queued for 1 second)
Status Job ID Name Coverage
  Static
failed #908028830
static

00:00:56

 
Name Stage Failure
failed
static Static
pylint create: /builds/ansgarschmidt/satnogs-auto-scheduler/.tox/pylint
pylint run-test-pre: PYTHONHASHSEED='1278385669'
___________________________________ summary ____________________________________
py3-flake8: commands succeeded
isort: commands succeeded
ERROR: yapf: commands failed
pylint: commands succeeded
Cleaning up file based variables
ERROR: Job failed: exit code 1