Ignore Pep8 #712, as it conflicts with GAE
Ignore Pep8 #712, as it conflicts with GAE

`#712` enforces that comparison to True must be 'if cond is True:' or
'if cond:'.  However, GAE overrides `__eq__` for its query syntax, so
things like the following mistakenly get marked as lint errors:

    tasks = cls.query(
        cls.user_key == user_data.key(),
        cls.domain == domain,
        cls.is_completed == False,
        cls.is_library_task == True).fetch(5)

Auditors: colin

Test Plan:
  - Lint file with example Pep8 #712 violation
    (`webapp:sat/task_models.py`), see failure before this commit, no
    failure after

Khan/khan-linter,Khan/khan-linter,Khan/khan-linter,Khan/khan-linter