Improve launderette plannings and admin part

1 job for master in 2 minutes and 11 seconds (queued for 2 seconds)
Name Stage Failure
failed
test Test There is an unknown failure, please try again
  File "/builds/ae/Sith/core/tests.py", line 164, in test_login_fail
self.assertTrue('Please try again' in str(response.content))
AssertionError: False is not true

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Ran 19 tests in 5.217s

FAILED (failures=6, errors=2)
ERROR: Build failed: exit code 1