Login with a consumer_name and the default authorization engine errors out

[Sebastien Bacher]

Using launchpadlib 1.10.16

>>> lp.login_with(service_root='production', version='devel', consumer_name='try')
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 543, in login_with
    authorization_engine = cls.authorization_engine_factory(
  File "/usr/lib/python3/dist-packages/launchpadlib/launchpad.py", line 230, in authorization_engine_factory
    return AuthorizeRequestTokenWithBrowser(*args)
  File "/usr/lib/python3/dist-packages/launchpadlib/credentials.py", line 735, in __init__
    super(AuthorizeRequestTokenWithBrowser, self).__init__(
  File "/usr/lib/python3/dist-packages/launchpadlib/credentials.py", line 532, in __init__
    raise ValueError(
ValueError: You must provide either application_name or consumer_name.

Colin pointed out that the AuthorizeRequestTokenWithBrowser constructor specifically discards consumer_name, one workaround is to specify authorization_engine=AuthorizeRequestTokenWithURL('production', consumer_name='try')