Move developer packages to dev-packages

1 job for 2.2-dev in 1 minute and 11 seconds
Name Stage Failure
whats-open-py3.5 Test
  File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 697, in exec_module
File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
File "/builds/srct/whats-open/whats-open/settings/", line 13, in <module>
if environ["WOPEN_ENV"] != "production":
File "/usr/local/lib/python3.5/", line 725, in __getitem__
raise KeyError(key) from None
KeyError: 'WOPEN_ENV'
ERROR: Job failed: exit code 1